Jaslyn buys a windbreaker, a blouse, a blazer and a vest. The average cost of these items is $32. The total cost of the blazer and the vest is ³₅ of the total cost of the windbreaker and the blouse. If the windbreaker costs $11.20 and the vest costs $9.60, find the difference in cost between the blouse and the blazer.
Total cost of the 4 items
= 4 x 32
= $128

Total cost of the blazer and the vest = 3 u
Total cost of the windbreaker and the blouse = 5 u

Total cost of the 4 items
= 3 u + 5 u
= 8 u

8 u = 128

1 u = 128 ÷ 8 = 16

Total cost of the blazer and the vest
= 3 u
= 3 x 16
= $48

Cost of the blazer
= 48 - 9.60
= $38.40

Total cost of the windbreaker and the blouse
= 5 u
= 5 x 16
= $80

Cost of the blouse
= 80 - 11.20
= $68.80

Difference in cost between the blouse and the blazer
= 68.80 - 38.40
= $30.40

Answer(s): $30.40