Question

PS1: In part 1, I'm not sure how to do the final step. Specifically, how do I find the sum of each payment made in each successive step of the loop?

Answer 1

You need to set some variable up outside the loop if to be able to add to it inside the loop. Each pass through the loop it adds to it.

Answer 2

For example:
```
>>> x = 0
>>> for i in range(3):
x = x + i
print x


0
1
3
```

Answer 3

ah perfect, thank you!