Finished CoffeeVendingMachine.cs Cancel class

CoffeeVendingMachines/CoffeeVendingMachine.cs

@@ -45,8 +45,27 @@ public class CoffeeVendingMachine
 
     public CoinDepot[] Cancel()
     {
-        //TODO
+        int count = 0;
-        return [];
+        foreach (var inputCoin in _currentInputCoins)
+        {
+            if (inputCoin.Count > 0)
+            {
+                count++;
+            }
+        }
+        CoinDepot[] newInputCoins = new CoinDepot[count];
+
+        int j = 0;
+        for (int i = 0; i < _currentInputCoins.Length; i++)
+        {
+            if (_currentInputCoins[i].Count > 0)
+            {
+                newInputCoins[j] = new CoinDepot(_currentInputCoins[i]);
+                j++;
+            }
+        }
+        
+        return newInputCoins;
     }
     
     /// <summary>