The table shows the charges for printing at a printing company. The cost per piece is based on the total number of copies to be printed.
- Usha wanted to place an order to print 410 A3-size copies of her poster. How much did she need to pay?
- Cole placed an order to print some A4-size copies of his poster. Japheth placed an order to print some A3-size copies of his poster. Both of them ordered an equal number of copies of their posters. The total cost of their orders was $191.40. How many A4-size copies of the poster did Cole print?
(a)
Amount that Usha needed to pay
= 60 + 410 x 0.50
= $265
(b)
Total cost = $191.40
Printing cost excluding the basic printing charges
= 191.40 - 50 - 60
= $81.40
Amount of 1 A4 copy and 1 A3 copy if the cost per piece was between 1 to 49
= 0.60 + 1.00
= $1.60
Number of sets if the number of copies that each boy printed was between 1 to 49
= 81.40 ÷ 1.6
≈ 50.9 (x) (Number of sets must be a whole number and is between 1 to 49.)
Amount of 1 A4 copy and 1 A3 copy if the cost per piece was between 50 to 99
= 0.35 + 0.75
= $1.10
Number of sets if the number of copies that each boy printed was between 50 to 99
= 81.40 ÷ 1.1
= 74 (✓) (Number of sets must be a whole number and is between 50 to 99.)
Number of A4-size copies of the poster that Cole printed = 74
Answer(s): (a) $265; (b) 74