During her shopping trip, Lucy 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 : $2.10
Pencil X : $10
Pencil Y : $0.40
Given that Lucy bought a total 540 pencils, how much did Lucy 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 |
$2.10 |
$10 |
$0.40 |
|
18 u = 540
1 u = 540 ÷ 18 = 30
Number of Pencil W
= 6 x 30
= 180
Number of Pencil X
= 3 x 30
= 90
Number of Pencil Y
= 9 x 30
= 270
Total revenue
= 180 x 2.10 + 90 x 10 + 270 x 0.40
= 378.00 + 900.00 + 108.00
= $1386.00
Answer(s): $1386.00