For every good windbreaker that Ahmad sold, Ahmad earned $13. He sold defective windbreakers at a discount, which would cause him to lose $5 per defective windbreaker. In March, for every 24 windbreakers sold, 3 were defective. Ahmad earned $1290 from the windbreakers sold.

1. How many less windbreakers sold were defective than good?
2. How much less money did he earn because of the defective windbreakers?

	Good	Defective	Total
Number	21 u	3 u
Value	+ 13	- 5
Total Value	273 u	- 15 u	$1290

(a)
Amount that Ahmad earned 
= 273 u - 15 u
= 258 u

258 u = 1290

1 u = 1290 ÷ 258 = 5

Number of less windbreakers sold that were defective than good
= 21 u - 3 u
= 18 u
= 18 x 5
= 90

(b)
Number of defective windbreakers
= 3 u
= 3 x 5
= 15

Less amount earned for one defective jacket
= 13 + 5
= $18

Less amount earned because of all the defective windbreakers
= 15 x 18
= $270

Answer(s): (a) 90; (b) $270