During her shopping trip, Zoe bought three different types of pencils, K, L and M in the ratio of 5 : 2 : 9. She decided to sell them at the prices listed as shown.
Pencil K : $1.30
Pencil L : $0.90
Pencil M : $0.40
Given that Zoe bought a total 560 pencils, how much did Zoe collect from the sale of all the pencils?
|
Pencil K |
Pencil L |
Pencil M |
Total |
Ratio of pencil |
5 u |
2 u |
9 u |
16 u |
Value of each pencil |
$1.30 |
$0.90 |
$0.40 |
|
16 u = 560
1 u = 560 ÷ 16 = 35
Number of Pencil K
= 5 x 35
= 175
Number of Pencil L
= 2 x 35
= 70
Number of Pencil M
= 9 x 35
= 315
Total revenue
= 175 x 1.30 + 70 x 0.90 + 315 x 0.40
= 227.50 + 63.00 + 126.00
= $416.50
Answer(s): $416.50