Perry buys a dress, a jumpsuit and a blouse. The average cost of these items is $83. The cost of the blouse is four times the total cost of the dress and the jumpsuit. If the dress costs $14, find the difference in cost between the jumpsuit and the blouse.
Total cost of the 3 items
= 3 x 83
= $249

Total cost of the dress and the jumpsuit = 1 u
Cost of the blouse = 4 u

Total cost of the 3 items 
= 1 u + 4 u
= 5 u

5 u = 249 

1 u = 249 ÷ 5 = 49.80

Total cost of the dress and the jumpsuit = $49.80

Cost of the jumpsuit 
= 49.80 - 14
= $35.80

Cost of the blouse
= 4 u
= 4 x 49.80
= $199.20

Difference in cost between the jumpsuit and the blouse
= 199.20 - 35.80
= $163.40

Answer(s): $163.40