Vanessa buys a sweater, a jacket, a windbreaker and a shirt. The average cost of these items is $28. The total cost of the windbreaker and the shirt is ²₅ of the total cost of the sweater and the jacket. If the sweater costs $17.30 and the shirt costs $14.40, find the difference in cost between the jacket and the windbreaker.
Total cost of the 4 items
= 4 x 28
= $112

Total cost of the windbreaker and the shirt = 2 u
Total cost of the sweater and the jacket = 5 u

Total cost of the 4 items
= 2 u + 5 u
= 7 u

7 u = 112

1 u = 112 ÷ 7 = 16

Total cost of the windbreaker and the shirt
= 2 u
= 2 x 16
= $32

Cost of the windbreaker
= 32 - 14.40
= $17.60

Total cost of the sweater and the jacket
= 5 u
= 5 x 16
= $80

Cost of the jacket
= 80 - 17.30
= $62.70

Difference in cost between the jacket and the windbreaker
= 62.70 - 17.60
= $45.10

Answer(s): $45.10