During her shopping trip, Sabrina bought three different types of pens, M, N and P in the ratio of 5 : 3 : 7. She decided to sell them at the prices listed as shown.
Pen M : $2.40
Pen N : $0.80
Pen P : $0.30
Given that Sabrina bought a total 585 pens, how much did Sabrina collect from the sale of all the pens?
|
Pen M |
Pen N |
Pen P |
Total |
Ratio of pen |
5 u |
3 u |
7 u |
15 u |
Value of each pen |
$2.40 |
$0.80 |
$0.30 |
|
15 u = 585
1 u = 585 ÷ 15 = 39
Number of Pen M
= 5 x 39
= 195
Number of Pen N
= 3 x 39
= 117
Number of Pen P
= 7 x 39
= 273
Total revenue
= 195 x 2.40 + 117 x 0.80 + 273 x 0.30
= 468.00 + 93.60 + 81.90
= $643.50
Answer(s): $643.50