Elyse buys a skirt, a jumpsuit, a coat and a jacket. The average cost of these items is $33. The total cost of the coat and the jacket is ³₈ of the total cost of the skirt and the jumpsuit. If the skirt costs $17.40 and the jacket costs $17.20, find the difference in cost between the jumpsuit and the coat.
Total cost of the 4 items
= 4 x 33
= $132

Total cost of the coat and the jacket = 3 u
Total cost of the skirt and the jumpsuit = 8 u

Total cost of the 4 items
= 3 u + 8 u
= 11 u

11 u = 132

1 u = 132 ÷ 11 = 12

Total cost of the coat and the jacket
= 3 u
= 3 x 12
= $36

Cost of the coat
= 36 - 17.20
= $18.80

Total cost of the skirt and the jumpsuit
= 8 u
= 8 x 12
= $96

Cost of the jumpsuit
= 96 - 17.40
= $78.60

Difference in cost between the jumpsuit and the coat
= 78.60 - 18.80
= $59.80

Answer(s): $59.80