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.
- Yen wanted to place an order to print 290 A4-size copies of her poster. How much did she need to pay?
- Oscar placed an order to print some A4-size copies of his poster. Jeremy 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 $239.80. How many A4-size copies of the poster did Oscar print?
(a)
Amount that Yen needed to pay
= 30 + 290 x 0.10
= $59
(b)
Total cost = $239.80
Printing cost excluding the basic printing charges
= 239.80 - 30 - 40
= $169.80
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 man printed was between 1 to 49
= 169.80 ÷ 1.6
≈ 106.1 (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 man printed was between 50 to 99
= 169.80 ÷ 1.1
≈ 154.4 (x) (Number of sets must be a whole number and is between 50 to 99.)
Amount of 1 A4 copy and 1 A3 copy if the cost per piece was between 100 to 499
= 0.10 + 0.50
= $0.60
Number of sets if the number of copies that each man printed was between 100 to 499
= 169.80 ÷ 0.60
= 283 (✓) (Number of sets must be a whole number and is between 100 to 499.)
Number of A4-sized copies that Oscar printed = 283
Answer(s): (a) $59; (b) 283