During her shopping trip, Betty bought three different types of pencils, H, J and K in the ratio of 5 : 2 : 8. She decided to sell them at the prices listed as shown.
Pencil H : $2.70
Pencil J : $0.80
Pencil K : $0.30
Given that Betty bought a total 420 pencils, how much did Betty collect from the sale of all the pencils?
|
Pencil H |
Pencil J |
Pencil K |
Total |
Ratio of pencil |
5 u |
2 u |
8 u |
15 u |
Value of each pencil |
$2.70 |
$0.80 |
$0.30 |
|
15 u = 420
1 u = 420 ÷ 15 = 28
Number of Pencil H
= 5 x 28
= 140
Number of Pencil J
= 2 x 28
= 56
Number of Pencil K
= 8 x 28
= 224
Total revenue
= 140 x 2.70 + 56 x 0.80 + 224 x 0.30
= 378.00 + 44.80 + 67.20
= $490.00
Answer(s): $490.00