John and Henry had $188 and $128 respectively. Each of them bought a blouse and a jacket at the same price. The cost of the blouse was 3 times as much as the jacket. In the end, John had 4 times as much money as Henry. What was the difference between the cost of the jacket and the blouse?

	John	Henry	Difference
Before	$188	$128	$60
Change	- 4 p	- 4 p
After	4 u	1 u	3 u

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

4 u - 1 u = 188 - 128
3 u = 60

1 u = 60 ÷ 3 = 20

Cost of 1 blouse = 3 p
Cost of 1 jacket = 1 p

Total cost of 1 blouse and 1 jacket
= 3 p + 1 p
= 4 p

4 p = 128 - 20
4 p = 108

1 p = 108 ÷ 4 = 27

Difference in the cost between the blouse and the jacket
= 3 p - 1 p
= 2 p
= 2 x 27
= $54

Answer(s): $54