# Learn Lambda Functions by Building an Expense Tracker - Step 17

### Tell us what’s happening:

I am stuck it keeps telling me that there is an indentation error but idk how to solve it

``````def add_expense(expenses, amount, category):
expenses.append({'amount': amount, 'category': category})

def print_expenses(expenses):
for expense in expenses:
print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')

# User Editable Region

def total_expenses(expenses):
return sum(map(lambda expense: expense['amount'], expenses))

# User Editable Region

total = sum(map(get_amount, expenses))

expenses = []
``````

User Agent is: `Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.1`

### Challenge Information:

Learn Lambda Functions by Building an Expense Tracker - Step 17

The indention error is caused by the indention of the first `return total` line.

The following code block is not needed:

``````    return total

total = sum(map(get_amount, expenses))
``````

Double-check the following line:

``````return sum(map(lambda expense: expense['amount'], expenses))
``````

The solution to the test is in there. Remember, the instruction wants you to return a `lambda` with `expense` as a parameter, and the value of the key `'amount'` inside the `expense` dictionary.

Also, the lambda function will be an implicit return for this test.

I hope this helps. Happy Coding!

Thank you👍 I really appreciate it

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