These are the instructions: Create a function that returns the sum of a list of numbers.

Here is my code:

```
n = [3, 5, 7]
def total(numbers):
result = 0
for item in n:
result = result + 1
return result
```

I don't know what I'm missing.

My error message reads:

Oops, try again. total([0, 3, 6]) returned 3 instead of 9