Xylia buys a dress, a jacket, a jumpsuit and a blouse. The average cost of these items is $44. The total cost of the jumpsuit and the blouse is ⁵₆ of the total cost of the dress and the jacket. If the dress costs $13.30 and the blouse costs $10.50, find the difference in cost between the jacket and the jumpsuit.
Total cost of the 4 items
= 4 x 44
= $176

Total cost of the jumpsuit and the blouse = 5 u
Total cost of the dress and the jacket = 6 u

Total cost of the 4 items
= 5 u + 6 u
= 11 u

11 u = 176

1 u = 176 ÷ 11 = 16

Total cost of the jumpsuit and the blouse
= 5 u
= 5 x 16
= $80

Cost of the jumpsuit
= 80 - 10.50
= $69.50

Total cost of the dress and the jacket
= 6 u
= 6 x 16
= $96

Cost of the jacket
= 96 - 13.30
= $82.70

Difference in cost between the jacket and the jumpsuit
= 82.70 - 69.50
= $13.20

Answer(s): $13.20