Raeann buys a blazer, a jumpsuit, a blouse and a jacket. The average cost of these items is $35. The total cost of the blouse and the jacket is ²₅ of the total cost of the blazer and the jumpsuit. If the blazer costs $17.10 and the jacket costs $10.60, find the difference in cost between the jumpsuit and the blouse.
Total cost of the 4 items
= 4 x 35
= $140

Total cost of the blouse and the jacket = 2 u
Total cost of the blazer and the jumpsuit = 5 u

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

7 u = 140

1 u = 140 ÷ 7 = 20

Total cost of the blouse and the jacket
= 2 u
= 2 x 20
= $40

Cost of the blouse
= 40 - 10.60
= $29.40

Total cost of the blazer and the jumpsuit
= 5 u
= 5 x 20
= $100

Cost of the jumpsuit
= 100 - 17.10
= $82.90

Difference in cost between the jumpsuit and the blouse
= 82.90 - 29.40
= $53.50

Answer(s): $53.50