Ahmad and Reggie had $115 and $67 respectively. Each of them bought a sweater and a skirt at the same price. The cost of the sweater was 4 times as much as the skirt. In the end, Ahmad had 5 times as much money as Reggie. What was the difference between the cost of the skirt and the sweater?

	Ahmad	Reggie	Difference
Before	$115	$67	$48
Change	- 5 p	- 5 p
After	5 u	1 u	4 u

Since Ahmad and Reggie bought the same items at the same price, the difference in the amounts they had remains unchanged at first and in the end.

5 u - 1 u = 115 - 67
4 u = 48

1 u = 48 ÷ 4 = 12

Cost of 1 sweater = 4 p
Cost of 1 skirt = 1 p

Total cost of 1 sweater and 1 skirt
= 4 p + 1 p
= 5 p

5 p = 67 - 12
5 p = 55

1 p = 55 ÷ 5 = 11

Difference in the cost between the sweater and the skirt
= 4 p - 1 p
= 3 p
= 3 x 11
= $33

Answer(s): $33