During her shopping trip, Shiyun bought three different types of pencils, W, X and Y in the ratio of 6 : 3 : 9. She decided to sell them at the prices listed as shown.
Pencil W : $2.30
Pencil X : $0.80
Pencil Y : $0.40
Given that Shiyun bought a total 450 pencils, how much did Shiyun collect from the sale of all the pencils?
|
Pencil W |
Pencil X |
Pencil Y |
Total |
Ratio of pencil |
6 u |
3 u |
9 u |
18 u |
Value of each pencil |
$2.30 |
$0.80 |
$0.40 |
|
18 u = 450
1 u = 450 ÷ 18 = 25
Number of Pencil W
= 6 x 25
= 150
Number of Pencil X
= 3 x 25
= 75
Number of Pencil Y
= 9 x 25
= 225
Total revenue
= 150 x 2.30 + 75 x 0.80 + 225 x 0.40
= 345.00 + 60.00 + 90.00
= $495.00
Answer(s): $495.00