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

gives me error: int not iterable

another solution worked but not sure I am getting the difference

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