Jenson buys a shirt, a blouse and a windbreaker. The average cost of these items is $56. The cost of the windbreaker is four times the total cost of the shirt and the blouse. If the shirt costs $24, find the difference in cost between the blouse and the windbreaker.
Total cost of the 3 items
= 3 x 56
= $168

Total cost of the shirt and the blouse = 1 u
Cost of the windbreaker = 4 u

Total cost of the 3 items 
= 1 u + 4 u
= 5 u

5 u = 168 

1 u = 168 ÷ 5 = 33.60

Total cost of the shirt and the blouse = $33.60

Cost of the blouse 
= 33.60 - 24
= $9.60

Cost of the windbreaker
= 4 u
= 4 x 33.60
= $134.40

Difference in cost between the blouse and the windbreaker
= 134.40 - 9.60
= $124.80

Answer(s): $124.80