During her shopping trip, Winnie bought three different types of pencils, X, Y and Z in the ratio of 6 : 2 : 7. She decided to sell them at the prices listed as shown.
Pencil X : $2.60
Pencil Y : $0.75
Pencil Z : $0.30
Given that Winnie bought a total 510 pencils, how much did Winnie collect from the sale of all the pencils?
|
Pencil X |
Pencil Y |
Pencil Z |
Total |
Ratio of pencil |
6 u |
2 u |
7 u |
15 u |
Value of each pencil |
$2.60 |
$0.75 |
$0.30 |
|
15 u = 510
1 u = 510 ÷ 15 = 34
Number of Pencil X
= 6 x 34
= 204
Number of Pencil Y
= 2 x 34
= 68
Number of Pencil Z
= 7 x 34
= 238
Total revenue
= 204 x 2.60 + 68 x 0.75 + 238 x 0.30
= 530.40 + 51.00 + 71.40
= $652.80
Answer(s): $652.80