Peter buys a sweater, a jacket and a windbreaker. The average cost of these items is $92. The cost of the windbreaker is four times the total cost of the sweater and the jacket. If the sweater costs $14, find the difference in cost between the jacket and the windbreaker.
Total cost of the 3 items
= 3 x 92
= $276

Total cost of the sweater and the jacket = 1 u
Cost of the windbreaker = 4 u

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

5 u = 276 

1 u = 276 ÷ 5 = 55.20

Total cost of the sweater and the jacket = $55.20

Cost of the jacket 
= 55.20 - 14
= $41.20

Cost of the windbreaker
= 4 u
= 4 x 55.20
= $220.80

Difference in cost between the jacket and the windbreaker
= 220.80 - 41.20
= $179.60

Answer(s): $179.60