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.
- Irene wanted to place an order to print 390 A3-size copies of her poster. How much did she need to pay?
- Fabian placed an order to print some A4-size copies of his poster. Jack 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 $179.10. How many A4-size copies of the poster did Fabian print?
(a)
Amount that Irene needed to pay
= 50 + 390 x 0.50
= $245
(b)
Total cost = $179.10
Printing cost excluding the basic printing charges
= 179.10 - 40 - 50
= $89.10
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
= 89.10 ÷ 1.6
≈ 55.7 (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
= 89.10 ÷ 1.1
= 81 (✓) (Number of sets must be a whole number and is between 50 to 99.)
Number of A4-size copies of the poster that Fabian printed = 81
Answer(s): (a) $245; (b) 81