Isaac wants to buy some staplers of the same price. If she buys 4 staplers, she will have $7.90 left. If she buys 9 staplers, she will short of $2.10.
- How much does each stapler cost?
- How much does Isaac have?
(a)
Difference in the number of staplers
= 9 - 4
= 5
Amount that Isaac needs to buy 5 staplers
= 7.90 + 2.10
= $10.00
Cost of each stapler
= 10.00 ÷ 5
= $2.00
(b)
Amount that Isaac has
= 4 x 2.00 + 7.90
= $15.90
Answer(s): (a) $2.00; (b) $15.90