diff --git a/exercises/ex05/ex05b.py b/exercises/ex05/ex05b.py
index e69de29..1506ad5 100644
--- a/exercises/ex05/ex05b.py
+++ b/exercises/ex05/ex05b.py
@@ -0,0 +1,29 @@
+import sys
+
+tests = [
+    {'rope': 1, 'torch': 6, 'gold coin': 42, 'dagger': 1, 'arrow': 12},
+    {'rope': 1, 'torch': 6, 'gold coin': "a", 'dagger': 1, 'arrow': 12},
+    None,
+]
+
+
+def displayInventory(inventory):
+    msg = "Inventory:\n"
+    total = 0
+    if not isinstance(inventory, dict):
+        return False, "Invalid inventory type"
+    for item, amount in inventory.items():
+        msg += f"{amount} {item}\n"
+        if not isinstance(amount, int):
+            return False, f"Invalid amount for '{item}'"
+        total += amount
+    return True, f"{msg}Total number of items: {total}"
+
+
+valid = True
+for inventory in tests:
+    print(f"Testing inventory '{inventory}': ")
+    valid, msg = displayInventory(inventory)
+    print(msg)
+if not valid:
+    sys.exit(1)
diff --git a/exercises/ex05/ex05c.py b/exercises/ex05/ex05c.py
index e69de29..6e1d322 100644
--- a/exercises/ex05/ex05c.py
+++ b/exercises/ex05/ex05c.py
@@ -0,0 +1,40 @@
+import sys
+
+dragonLoot = ['gold coin', 'dagger', 'gold coin', 'gold coin', 'ruby']
+tests = [
+    {'rope': 1, 'torch': 6, 'gold coin': 42, 'dagger': 1, 'arrow': 12},
+    {'rope': 1, 'torch': 6, 'gold coin': "a", 'dagger': 1, 'arrow': 12},
+    None,
+]
+
+
+def displayInventory(inventory):
+    msg = "Inventory:\n"
+    total = 0
+    if not isinstance(inventory, dict):
+        return False, "Invalid inventory type"
+    for item, amount in inventory.items():
+        msg += f"{amount} {item}\n"
+        if not isinstance(amount, int):
+            return False, f"Invalid amount for '{item}'"
+        total += amount
+    return True, f"{msg}Total number of items: {total}"
+
+
+def addToInventory(inv, items):
+    for item in items:
+        inv.setdefault(item, 0)
+        inv[item] += 1
+    return inv
+
+
+valid = True
+for inventory in tests:
+    print(f"Testing inventory addition with '{dragonLoot}': ")
+    valid, msg = displayInventory(inventory)
+    if valid:
+        inventory = addToInventory(inventory, dragonLoot)
+        valid, msg = displayInventory(inventory)
+    print(msg)
+if not valid:
+    sys.exit(1)