No, Shani is not right.
The 1st customer to get popcorn and apple juice is the 18th customer.
She missed that 18 is a common multiple of 6 & 9
Here's the relevant formula:
1 - r^n
nth partial sum = a* ------------
1 - r
1 - r^25
Here, the 25th partial sum is 177147 *-------------
1 - r
Unfortunately, you haven't yet shared the value of the common ratio. Find that value and substitute it for r in the above expression.
120 is the answer to your question
I DK I DK I DK I DK but maybe it’s already in that order
The change would start off as a negative and end as a positive she would end up with $425
