During her shopping trip, Erika bought three different types of markers, P, Q and R in the ratio of 4 : 2 : 7. She decided to sell them at the prices listed as shown.
Marker P : $2.70
Marker Q : $0.70
Marker R : $0.60
Given that Erika bought a total 494 markers, how much did Erika collect from the sale of all the markers?
|
Marker P |
Marker Q |
Marker R |
Total |
Ratio of marker |
4 u |
2 u |
7 u |
13 u |
Value of each marker |
$2.70 |
$0.70 |
$0.60 |
|
13 u = 494
1 u = 494 ÷ 13 = 38
Number of Marker P
= 4 x 38
= 152
Number of Marker Q
= 2 x 38
= 76
Number of Marker R
= 7 x 38
= 266
Total revenue
= 152 x 2.70 + 76 x 0.70 + 266 x 0.60
= 410.40 + 53.20 + 159.60
= $623.20
Answer(s): $623.20