Learn
A Day at the Supermarket
Making a Purchase

Good! Now you’re going to need to know how much you’re paying for all of the items on your grocery list.

``````def sum(numbers):
total = 0
for number in numbers:
total += number

n = [1, 2, 5, 10, 13]
print sum(n)``````
1. In the above example, we first define a function called `sum` with a parameter `numbers`.
2. We initialize the variable `total` which we will use as our running sum.
3. For each number in the list, we add that number to the running sum `total`.
4. At the end of the function, we return the running sum.
5. After the function, we create, `n`, a list of numbers.
6. Finally, we call the `sum(numbers)` function with the variable `n` and print the result.

### Instructions

1.

Define a function `compute_bill` that takes one argument `food` as input.

In the function, create a variable `total` with an initial value of zero.

For each item in the `food` list, add the price of that item to `total`.

Finally, `return` the `total`.

Ignore whether or not the item you’re billing for is in stock.Note that your function should work for any food list.