For every good dress that Mark sold, Mark earned $21. He sold defective dresses at a discount, which would cause him to lose $4 per defective dress. In September, for every 23 dresses sold, 3 were defective. Mark earned $816 from the dresses sold.
- How many less dresses sold were defective than good?
- How much less money did he earn because of the defective dresses?
|
Good |
Defective |
Total |
Number |
20 u |
3 u |
|
Value |
+ 21 |
- 4 |
|
Total Value |
420 u |
- 12 u |
$816 |
(a)
Amount that Mark earned
= 420 u - 12 u
= 408 u
408 u = 816
1 u = 816 ÷ 408 = 2
Number of less dresses sold that were defective than good
= 20 u - 3 u
= 17 u
= 17 x 2
= 34
(b)
Number of defective dresses
= 3 u
= 3 x 2
= 6
Less amount earned for one defective jacket
= 21 + 4
= $25
Less amount earned because of all the defective dresses
= 6 x 25
= $150
Answer(s): (a) 34; (b) $150