Stella wants to buy some files of the same price. If she buys 4 files, she will have $3.10 left. If she buys 8 files, she will short of $2.30.
- How much does each file cost?
- How much does Stella have?
(a)
Difference in the number of files
= 8 - 4
= 4
Amount that Stella needs to buy 4 files
= 3.10 + 2.30
= $5.40
Cost of each file
= 5.40 ÷ 4
= $1.35
(b)
Amount that Stella has
= 4 x 1.35 + 3.10
= $8.50
Answer(s): (a) $1.35; (b) $8.50