Harry bought $438 worth of punchers and correction tapes. He bought thrice as many correction tapes as punchers. He spent $162 more on correction tapes than on punchers. Each puncher cost $1.90 more than each correction tape. Find the price of a puncher.
(a)
Total amount that the punchers cost
= (438 - 162) ÷ 2
= 276 ÷ 2
= $138

Total amount that the correction tapes cost
= 438 - 138
= $300

Number of sets of correction tapes = 3
Number of sets of punchers = 1

Cost of 1 set of correction tapes
= 300 ÷ 3
= $100

Amount that 1 set of punchers cost more than 1 set of correction tapes
= 138 - 100
= $38

Number of items in 1 set
= 38 ÷ 1.90
= 20

Price of a puncher
= 138 ÷ 20
= $6.90

Answer(s): $6.90