During her shopping trip, Mary bought three different types of pens, E, F and G in the ratio of 5 : 2 : 8. She decided to sell them at the prices listed as shown.
Pen E : $2.70
Pen F : $0.80
Pen G : $0.30
Given that Mary bought a total 570 pens, how much did Mary collect from the sale of all the pens?
|
Pen E |
Pen F |
Pen G |
Total |
Ratio of pen |
5 u |
2 u |
8 u |
15 u |
Value of each pen |
$2.70 |
$0.80 |
$0.30 |
|
15 u = 570
1 u = 570 ÷ 15 = 38
Number of Pen E
= 5 x 38
= 190
Number of Pen F
= 2 x 38
= 76
Number of Pen G
= 8 x 38
= 304
Total revenue
= 190 x 2.70 + 76 x 0.80 + 304 x 0.30
= 513.00 + 60.80 + 91.20
= $665.00
Answer(s): $665.00