I believe the correct answer is B
Increase : 29.96
Decrease: 26.04
The greatest remainder with 3 is 2, the greatest remainder with 8 is 7, and the greatest remainder with 5 is 4, all because if it was one more then it would not be remaining and it would be without a remainder. Hope this helps!
Its asking how much did they both spent, in total, in order to reach the same amount spent in part A
