diff --git a/CHANGELOG.md b/CHANGELOG.md
index 33e474c..d924594 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,16 @@
+v 1.8.0 [03-jun-2018]
+---------------------
+    - Se permiten 4 decimales en Tipo de cambio
+    - Se agrega el campo {total_cantidades} al generar el PDF
+    - Se agrega opción para generar respaldos de la BD en MV
+    - Fix: Al generar con complemento EDU
+
+
 v 1.7.0 [23-may-2018]
 ---------------------
     - Se agrega soporte para truncar impuestos locales, para las estulticias de los "ingenieros" de las dependencias de gobierno
 
+
 v 1.6.1 [09-abr-2018]
 ---------------------
     - Fix: Nómina con separación
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..afa2b35
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+1.8.0
\ No newline at end of file
diff --git a/source/app/controllers/cfdi_xml.py b/source/app/controllers/cfdi_xml.py
index 23be3e6..a192565 100644
--- a/source/app/controllers/cfdi_xml.py
+++ b/source/app/controllers/cfdi_xml.py
@@ -124,6 +124,8 @@ class CFDI(object):
         if datos['donativo']:
             self._donativo = True
 
+        self._edu = datos['edu']
+
         if datos['complementos']:
             if 'ine' in datos['complementos']:
                 self._ine = True
diff --git a/source/app/controllers/main.py b/source/app/controllers/main.py
index df29e35..ec81ac5 100644
--- a/source/app/controllers/main.py
+++ b/source/app/controllers/main.py
@@ -17,7 +17,11 @@ class AppEmpresas(object):
 
     def on_post(self, req, resp):
         values = req.params
-        req.context['result'] = self._db.empresa_agregar(values)
+        opt = values.pop('opt', '1')
+        if opt == '1':
+            req.context['result'] = self._db.empresa_agregar(values)
+        elif opt == '2':
+            req.context['result'] = self._db.respaldar_dbs()
         resp.status = falcon.HTTP_200
 
     def on_delete(self, req, resp):
diff --git a/source/app/controllers/util.py b/source/app/controllers/util.py
index ceac5f2..f691d99 100644
--- a/source/app/controllers/util.py
+++ b/source/app/controllers/util.py
@@ -627,6 +627,7 @@ class LIBO(object):
         self._sm = None
         self._desktop = None
         self._currency = 'MXN'
+        self._total_cantidades = 0
         if self.is_running:
             ctx = uno.getComponentContext()
             service = 'com.sun.star.bridge.UnoUrlResolver'
@@ -872,7 +873,7 @@ class LIBO(object):
                 col5.append((float(valor_unitario),))
                 col6.append((float(importe),))
                 col7.append((float(descuento),))
-
+            self._total_cantidades += float(cantidad)
         if not count:
             return
 
@@ -934,6 +935,8 @@ class LIBO(object):
         }
         currency = data['moneda']
 
+        self._set_cell('{total_cantidades}', str(self._total_cantidades))
+
         cell_title = self._set_cell('{subtotal.titulo}', 'SubTotal')
         value = data['subtotal']
         cell_value = self._set_cell('{subtotal}', value, value=True)
@@ -1568,7 +1571,7 @@ def _comprobante(doc, options):
     data['fechaformato'] = fecha.strftime('%A, %d de %B de %Y')
 
     if 'tipocambio' in data:
-        data['tipocambio'] = 'Tipo de Cambio: $ {:0.2f}'.format(
+        data['tipocambio'] = 'Tipo de Cambio: $ {:0.4f}'.format(
             float(data['tipocambio']))
     data['notas'] = options['notas']
 
@@ -3411,3 +3414,20 @@ def get_timbres(rfc, token):
 def truncate(value):
     return trunc(value * 100) / 100
 
+
+def validate_path_bk():
+    path_bk = _join(str(Path.home()), DIR_FACTURAS)
+    if not os.path.isdir(path_bk):
+        msg = 'No existe la carpeta'
+        return {'ok': False, 'msg': msg}
+
+    return {'ok': True, 'msg': path_bk}
+
+
+def respaldar_db(values, path_bk):
+    user = values[0].lower()
+    db = loads(values[1])['name']
+    path = _join(path_bk, '{}.bk'.format(user))
+    args = 'pg_dump -U postgres -Fc {} > "{}"'.format(db, path)
+    _call(args)
+    return
diff --git a/source/app/models/db.py b/source/app/models/db.py
index 00176ca..c788120 100644
--- a/source/app/models/db.py
+++ b/source/app/models/db.py
@@ -28,6 +28,9 @@ class StorageEngine(object):
     def empresa_borrar(self, values):
         return main.empresa_borrar(values['rfc'])
 
+    def respaldar_dbs(self):
+        return main.respaldar_dbs()
+
     def _get_empresas(self, values):
         return main.get_empresas()
 
@@ -107,8 +110,8 @@ class StorageEngine(object):
     def enviar_prefac(self, values):
         return main.PreFacturas.enviar(values['id'])
 
-    def _get_cancelinvoice(self, values):
-        return main.Facturas.cancel(values['id'])
+    # ~ def _get_cancelinvoice(self, values):
+        # ~ return main.Facturas.cancel(values['id'])
 
     def _get_statussat(self, values):
         return main.Facturas.get_status_sat(values['id'])
@@ -371,8 +374,8 @@ class StorageEngine(object):
     def get_preinvoices(self, values):
         return main.PreFacturas.get_(values)
 
-    def _get_timbrar(self, values):
-        return main.Facturas.timbrar(values)
+    # ~ def _get_timbrar(self, values):
+        # ~ return main.Facturas.timbrar(values)
 
     def _get_anticipoegreso(self, values):
         return main.Facturas.anticipo_egreso(int(values['id']))
diff --git a/source/app/models/main.py b/source/app/models/main.py
index ebe7117..84b46a3 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -18,7 +18,7 @@ from controllers import util
 from settings import log, DEBUG, VERSION, PATH_CP, COMPANIES, PRE, CURRENT_CFDI, \
     INIT_VALUES, DEFAULT_PASSWORD, DECIMALES, IMPUESTOS, DEFAULT_SAT_PRODUCTO, \
     CANCEL_SIGNATURE, PUBLIC, DEFAULT_SERIE_TICKET, CURRENT_CFDI_NOMINA, \
-    DEFAULT_SAT_NOMINA, DECIMALES_TAX, TITLE_APP
+    DEFAULT_SAT_NOMINA, DECIMALES_TAX, TITLE_APP, MV
 
 
 FORMAT = '{0:.2f}'
@@ -3811,7 +3811,6 @@ class Facturas(BaseModel):
         FacturasComplementos.create(**data)
         return
 
-
     def _get_serie(self, user, default_serie):
         if user.sucursal is None:
             return default_serie
@@ -3828,7 +3827,7 @@ class Facturas(BaseModel):
         emisor = Emisor.select()[0]
         values['serie'] = cls._get_serie(cls, user, values['serie'])
         values['folio'] = cls._get_folio(cls, values['serie'])
-        values['tipo_cambio'] = float(values['tipo_cambio'])
+        values['tipo_cambio'] = round(float(values['tipo_cambio']), 4)
         values['lugar_expedicion'] = emisor.cp_expedicion or emisor.codigo_postal
         values['anticipo'] = util.get_bool(values['anticipo'])
         values['donativo'] = util.get_bool(values['donativo'])
@@ -3850,6 +3849,9 @@ class Facturas(BaseModel):
             obj.total_mn = totals['total_mn']
             obj.save()
 
+        msg = 'G {}'.format(obj.id)
+        _save_log(user.usuario, msg, 'F')
+
         msg = 'Factura guardada correctamente. Enviando a timbrar'
         row = {
             'id': obj.id,
@@ -3859,6 +3861,7 @@ class Facturas(BaseModel):
             'fecha': obj.fecha,
             'tipo_comprobante': obj.tipo_comprobante,
             'estatus': obj.estatus,
+            'paid': 'No',
             'total_mn': obj.total_mn,
             'cliente': obj.cliente.nombre,
         }
@@ -3897,7 +3900,7 @@ class Facturas(BaseModel):
         comprobante['Moneda'] = invoice.moneda
         comprobante['TipoCambio'] = '1'
         if comprobante['Moneda'] != 'MXN':
-            comprobante['TipoCambio'] = FORMAT.format(invoice.tipo_cambio)
+            comprobante['TipoCambio'] = FORMAT_TAX.format(invoice.tipo_cambio)
         comprobante['Total'] = FORMAT.format(invoice.total)
         comprobante['TipoDeComprobante'] = invoice.tipo_comprobante
         if invoice.metodo_pago:
@@ -4190,7 +4193,7 @@ class Facturas(BaseModel):
         return
 
     @classmethod
-    def timbrar(cls, values):
+    def timbrar(cls, values, user):
         id = int(values['id'])
         update = util.loads(values.get('update', 'true'))
 
@@ -4221,6 +4224,9 @@ class Facturas(BaseModel):
             if update:
                 cls._update_inventory(cls, obj)
             cls._sync(cls, id, auth)
+
+            m = 'T {}'.format(obj.id)
+            _save_log(user.usuario, m, 'F')
         else:
             msg = result['error']
             obj.estatus = 'Error'
@@ -4379,6 +4385,16 @@ class Facturas(BaseModel):
         if args['opt'] == 'invoicepayed':
             return cls._set_invoices_payed(cls, args['ids'], user)
 
+        if args['opt'] == 'timbrar':
+            return cls.timbrar(args, user)
+
+        if args['opt'] == 'cancel':
+            result = cls.cancel(args['id'])
+            if result['ok']:
+                m = 'C {}'.format(args['id'])
+                _save_log(user.usuario, m, 'F')
+            return result
+
         return {'ok': False}
 
 
@@ -7136,6 +7152,13 @@ class CfdiNominaRelacionados(BaseModel):
         return [str(r.cfdi_origen.uuid) for r in query]
 
 
+@util.run_in_thread
+def _save_log(user, action, table):
+    data = {'usuario': user, 'accion': action, 'tabla': table}
+    Registro.add(data)
+    return
+
+
 def authenticate(args):
     respuesta = {'login': False, 'msg': 'No Autorizado', 'user': ''}
     values = util.get_con(args['rfc'])
@@ -7638,6 +7661,28 @@ def empresa_borrar(rfc):
     return True
 
 
+def respaldar_dbs():
+    if not MV:
+        msg = 'Solo MV'
+        return {'ok': False, 'msg': msg}
+
+    result = util.validate_path_bk()
+    if not result['ok']:
+        return result
+    path_bk = result['msg']
+
+    data = util.get_rfcs()
+    if not len(data):
+        msg = 'Sin bases de datos a respaldar'
+        return {'ok': False, 'msg': msg}
+
+    for row in data:
+        util.respaldar_db(row, path_bk)
+
+    msg = 'Bases de datos respaldadas correctamente'
+    return {'ok': True, 'msg': msg}
+
+
 def _importar_valores(archivo='', rfc=''):
     if not rfc:
         rfc = input('Introduce el RFC: ').strip().upper()
diff --git a/source/app/settings.py b/source/app/settings.py
index 8e83e74..b4061dd 100644
--- a/source/app/settings.py
+++ b/source/app/settings.py
@@ -31,8 +31,9 @@ except ImportError:
 
 
 DEBUG = DEBUG
-VERSION = '1.5.0'
+VERSION = '1.8.0'
 EMAIL_SUPPORT = ('soporte@empresalibre.net',)
+TITLE_APP = '{} v{}'.format(TITLE_APP, VERSION)
 
 BASE_DIR = os.path.abspath(os.path.dirname(__file__))
 
diff --git a/source/static/js/controller/invoices.js b/source/static/js/controller/invoices.js
index 77546d4..ed650d0 100644
--- a/source/static/js/controller/invoices.js
+++ b/source/static/js/controller/invoices.js
@@ -44,12 +44,14 @@ var invoices_controllers = {
         $$('lst_moneda').attachEvent('onChange', lst_moneda_change)
         $$('lst_tipo_comprobante').attachEvent('onChange', lst_tipo_comprobante_change)
         $$('lst_serie').attachEvent('onChange', lst_serie_change)
+        $$('txt_tipo_cambio').attachEvent('onBlur', txt_tipo_cambio_lost_focus)
 
         $$('cmd_cfdi_notes').attachEvent('onItemClick', cmd_cfdi_notes_click)
         $$('cmd_admin_invoice_notes').attachEvent('onItemClick', cmd_admin_invoice_notes_click)
         $$('cmd_import_invoice').attachEvent('onItemClick', cmd_import_invoice_click)
 
         webix.extend($$('grid_invoices'), webix.ProgressBar)
+        focus('search_client_name')
     }
 }
 
@@ -465,7 +467,8 @@ function generar_anticipo_egreso(id){
 
 
 function send_timbrar(id){
-    webix.ajax().get('/values/timbrar', {id: id}, function(text, data){
+    //~ webix.ajax().get('/values/timbrar', {id: id}, function(text, data){
+    webix.ajax().post('invoices', {opt: 'timbrar', id: id}, function(text, data){
         var values = data.json()
         if(values.ok){
             cmd_update_timbres_click()
@@ -1026,7 +1029,7 @@ function grid_details_before_edit_stop(state, editor){
         state.value = state.value.trim()
         if(state.value.length != 21){
             msg = 'El Pedimento debe ser de 21 caracteres, será  '
-            msg += 'rechazado por el SAT. Edita estalo hasta que ya '
+            msg += 'rechazado por el SAT. Editalo hasta que ya '
             msg += 'no veas este mensaje de error. <BR>'
             msg += '<BR>Caracteres: ' + state.value.length
             msg_error(msg)
@@ -1051,6 +1054,12 @@ function grid_details_before_edit_stop(state, editor){
             grid.unblockEvent()
             return true
         }
+
+        cantidad = cantidad.round(DECIMALES)
+        grid.blockEvent()
+        state.value = cantidad
+        grid.unblockEvent()
+
         var valor_unitario = parseFloat(row['valor_unitario'])
         var descuento = parseFloat(row['descuento'])
     }
@@ -1065,13 +1074,16 @@ function grid_details_before_edit_stop(state, editor){
             grid.unblockEvent()
             return true
         }
+
         if(cfg_invoice['with_taxes']){
             var valor_unitario = price_without_taxes(parseFloat(state.value), row.id_product)
-            grid.blockEvent()
-            state.value = valor_unitario
-            grid.unblockEvent()
+        }else{
+            var valor_unitario = parseFloat(state.value).round(DECIMALES)
         }
-        var valor_unitario = parseFloat(state.value)
+        grid.blockEvent()
+        state.value = valor_unitario
+        grid.unblockEvent()
+
         var cantidad = parseFloat(row['cantidad'])
         var descuento = parseFloat(row['descuento'])
     }
@@ -1087,6 +1099,8 @@ function grid_details_before_edit_stop(state, editor){
             grid.unblockEvent()
             return true
         }
+
+        descuento = descuento.round(DECIMALES)
         var cantidad = parseFloat(row['cantidad'])
         var valor_unitario = parseFloat(row['valor_unitario'])
 
@@ -1099,6 +1113,11 @@ function grid_details_before_edit_stop(state, editor){
             grid.unblockEvent()
             return true
         }
+
+        grid.blockEvent()
+        state.value = descuento
+        grid.unblockEvent()
+
     }
 
     var precio_final = valor_unitario - descuento
@@ -1316,7 +1335,8 @@ function grid_invoices_click(id, e, node){
 
 
 function send_cancel(id){
-    webix.ajax().get('/values/cancelinvoice', {id: id}, function(text, data){
+    //~ webix.ajax().get('/values/cancelinvoice', {id: id}, function(text, data){
+    webix.ajax().post('invoices', {opt: 'cancel', id: id}, function(text, data){
         var values = data.json()
         if(values.ok){
             msg_ok(values.msg)
@@ -1532,6 +1552,21 @@ function lst_moneda_change(nv, ov){
         $$('txt_tipo_cambio').config.readonly = false
     }
     $$('txt_tipo_cambio').refresh()
+    select_all('txt_tipo_cambio')
+}
+
+
+function txt_tipo_cambio_lost_focus(prev){
+    var tipo_cambio = $$('txt_tipo_cambio').getValue()
+
+    if(isNaN(tipo_cambio * 1)){
+        webix.UIManager.setFocus('txt_tipo_cambio')
+        msg = 'El Tipo de Cambio debe ser un valor númerico'
+        msg_error(msg)
+        $$('txt_tipo_cambio').setValue('1.00')
+    }else{
+        $$('txt_tipo_cambio').setValue(parseFloat(tipo_cambio).round(4))
+    }
 }
 
 
diff --git a/source/static/js/controller/tickets.js b/source/static/js/controller/tickets.js
index e408c8d..8259218 100644
--- a/source/static/js/controller/tickets.js
+++ b/source/static/js/controller/tickets.js
@@ -531,7 +531,8 @@ function chk_is_invoice_day_change(new_value, old_value){
 
 
 function send_timbrar_invoice(id){
-    webix.ajax().get('/values/timbrar', {id: id, update: false}, function(text, data){
+    //~ webix.ajax().get('/values/timbrar', {id: id, update: false}, function(text, data){
+    webix.ajax().post('invoices', {opt: 'timbrar', id: id, update: false}, function(text, data){
         var values = data.json()
         if(values.ok){
             msg_ok(values.msg)
diff --git a/source/static/js/controller/util.js b/source/static/js/controller/util.js
index 38285ff..aa7bd4d 100644
--- a/source/static/js/controller/util.js
+++ b/source/static/js/controller/util.js
@@ -53,6 +53,12 @@ function focus(name){
 }
 
 
+function select_all(name){
+    focus(name)
+    $$(name).getInputNode().select()
+}
+
+
 function to_end(name){
     focus(name)
     var txt = $$(name)
diff --git a/source/static/js/ui/empresas.js b/source/static/js/ui/empresas.js
index 41fe907..ffca9ad 100644
--- a/source/static/js/ui/empresas.js
+++ b/source/static/js/ui/empresas.js
@@ -16,6 +16,11 @@ var header = [
     {view: 'button', type: 'icon', width: 40, css: 'app_button',
         icon: 'home', click: 'window.location = "/"'},
 ]
+var footer = [
+    {},
+    {view: 'button', value: 'Respaldar BD', click: 'cmd_respaldar_bd'},
+    {},
+]
 
 
 var grid_empresas_cols = [
@@ -57,6 +62,7 @@ var ui_empresas = {
                     }
                 },
                 grid_empresas,
+                {view: 'toolbar', elements: footer},
             ]}, {}, ]
         },
     ]
diff --git a/source/static/js/ui/school.js b/source/static/js/ui/school.js
index 9746d85..0d2f892 100644
--- a/source/static/js/ui/school.js
+++ b/source/static/js/ui/school.js
@@ -22,7 +22,7 @@ var grid_cols_students = [
         sort: 'string'},
     {id: 'rfc', header: ['RFC', {content: 'textFilter'}], adjust: 'data',
         sort: 'string'},
-    {id: 'curp', header: ['CURP'], sort: 'string'},
+    {id: 'curp', header: ['CURP'], sort: 'string', adjust: 'data'},
 ]
 
 
diff --git a/source/templates/empresas.html b/source/templates/empresas.html
index baa03f2..3d4795f 100644
--- a/source/templates/empresas.html
+++ b/source/templates/empresas.html
@@ -42,6 +42,8 @@ function validate_nuevo_rfc(){
         return
     }
 
+    values['opt'] = 1
+
     msg = '¿Estás seguro de agregar este nuevo emisor?'
     webix.confirm({
         title: 'Agregar Emisor',
@@ -99,6 +101,37 @@ function grid_empresas_click(id, e, node){
 }
 
 
+function respaldar_bd(){
+    webix.ajax().post("/empresas", {'opt': 2}, function(text, data, xhr) {
+        var values = data.json();
+        if (values.ok) {
+            msg_ok(values.msg)
+        } else {
+            msg_error(values.msg)
+        }
+    })
+}
+
+
+function cmd_respaldar_bd(){
+    msg = '¿Estás seguro de respaldar las Bases de Datos?'
+    webix.confirm({
+        title: 'Respaldar BD',
+        ok: 'Si',
+        cancel: 'No',
+        type: 'confirm-error',
+        text: msg,
+        callback:function(result){
+            if(result){
+                msg = 'Respaldando Bases de datos...'
+                msg_ok(msg)
+                respaldar_bd()
+            }
+        }
+    })
+}
+
+
 webix.ready(function(){
     webix.ui(ui_empresas)
     $$('grid_empresas').attachEvent('onItemClick', grid_empresas_click)