Luis buys a blouse, a windbreaker and a jumpsuit. The average cost of these items is $54. The cost of the jumpsuit is four times the total cost of the blouse and the windbreaker. If the blouse costs $28, find the difference in cost between the windbreaker and the jumpsuit.
Total cost of the 3 items
= 3 x 54
= $162

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

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

5 u = 162 

1 u = 162 ÷ 5 = 32.40

Total cost of the blouse and the windbreaker = $32.40

Cost of the windbreaker 
= 32.40 - 28
= $4.40

Cost of the jumpsuit
= 4 u
= 4 x 32.40
= $129.60

Difference in cost between the windbreaker and the jumpsuit
= 129.60 - 4.40
= $125.20

Answer(s): $125.20