Kylie buys a coat, a blouse, a jumpsuit and a dress. The average cost of these items is $24. The total cost of the jumpsuit and the dress is ³₅ of the total cost of the coat and the blouse. If the coat costs $19.60 and the dress costs $18.80, find the difference in cost between the blouse and the jumpsuit.
Total cost of the 4 items
= 4 x 24
= $96

Total cost of the jumpsuit and the dress = 3 u
Total cost of the coat and the blouse = 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 jumpsuit and the dress
= 3 u
= 3 x 12
= $36

Cost of the jumpsuit
= 36 - 18.80
= $17.20

Total cost of the coat and the blouse
= 5 u
= 5 x 12
= $60

Cost of the blouse
= 60 - 19.60
= $40.40

Difference in cost between the blouse and the jumpsuit
= 40.40 - 17.20
= $23.20

Answer(s): $23.20