During her shopping trip, Tina bought three different types of pens, R, S and T in the ratio of 4 : 2 : 8. She decided to sell them at the prices listed as shown.
Pen R : $2.50
Pen S : $0.90
Pen T : $0.50
Given that Tina bought a total 518 pens, how much did Tina collect from the sale of all the pens?
|
Pen R |
Pen S |
Pen T |
Total |
Ratio of pen |
4 u |
2 u |
8 u |
14 u |
Value of each pen |
$2.50 |
$0.90 |
$0.50 |
|
14 u = 518
1 u = 518 ÷ 14 = 37
Number of Pen R
= 4 x 37
= 148
Number of Pen S
= 2 x 37
= 74
Number of Pen T
= 8 x 37
= 296
Total revenue
= 148 x 2.50 + 74 x 0.90 + 296 x 0.50
= 370.00 + 66.60 + 148.00
= $584.60
Answer(s): $584.60