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.
- Barbara wanted to place an order to print 310 A3-size copies of her poster. How much did she need to pay?
- Luis placed an order to print some A4-size copies of his poster. Ivan 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 $174.90. How many A4-size copies of the poster did Luis print?
(a)
Amount that Barbara needed to pay
= 60 + 310 x 0.50
= $215
(b)
Total cost = $174.90
Printing cost excluding the basic printing charges
= 174.90 - 50 - 60
= $64.90
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
= 64.90 ÷ 1.6
≈ 40.6 (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
= 64.90 ÷ 1.1
= 59 (✓) (Number of sets must be a whole number and is between 50 to 99.)
Number of A4-size copies of the poster that Luis printed = 59
Answer(s): (a) $215; (b) 59