Min buys a dress, a jumpsuit, a blazer and a blouse. The average cost of these items is $24. The total cost of the blazer and the blouse is ³₅ of the total cost of the dress and the jumpsuit. If the dress costs $10.30 and the blouse costs $14.90, find the difference in cost between the jumpsuit and the blazer.
Total cost of the 4 items
= 4 x 24
= $96

Total cost of the blazer and the blouse = 3 u
Total cost of the dress and the jumpsuit = 5 u

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

8 u = 96

1 u = 96 ÷ 8 = 12

Total cost of the blazer and the blouse
= 3 u
= 3 x 12
= $36

Cost of the blazer
= 36 - 14.90
= $21.10

Total cost of the dress and the jumpsuit
= 5 u
= 5 x 12
= $60

Cost of the jumpsuit
= 60 - 10.30
= $49.70

Difference in cost between the jumpsuit and the blazer
= 49.70 - 21.10
= $28.60

Answer(s): $28.60