Harry and Paul had $168 and $150 respectively. Each of them bought a shirt and a jacket at the same price. The cost of the shirt was 5 times as much as the jacket. In the end, Harry had 4 times as much money as Paul. What was the difference between the cost of the jacket and the shirt?

	Harry	Paul	Difference
Before	$168	$150	$18
Change	- 6 p	- 6 p
After	4 u	1 u	3 u

Since Harry and Paul 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 = 168 - 150
3 u = 18

1 u = 18 ÷ 3 = 6

Cost of 1 shirt = 5 p
Cost of 1 jacket = 1 p

Total cost of 1 shirt and 1 jacket
= 5 p + 1 p
= 6 p

6 p = 150 - 6
6 p = 144

1 p = 144 ÷ 6 = 24

Difference in the cost between the shirt and the jacket
= 5 p - 1 p
= 4 p
= 4 x 24
= $96

Answer(s): $96