Abigail 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 $1.10.
- How much does each file cost?
- How much does Abigail have?
(a)
Difference in the number of files
= 8 - 4
= 4
Amount that Abigail needs to buy 4 files
= 3.10 + 1.10
= $4.20
Cost of each file
= 4.20 ÷ 4
= $1.05
(b)
Amount that Abigail has
= 4 x 1.05 + 3.10
= $7.30
Answer(s): (a) $1.05; (b) $7.30