Roshel received $40 more pocket money than Min each month. Both of them spent $140 per month and saved the rest. After a few months, Roshel saved $1750 but Min only saved $1350.

1. What was Roshel's monthly pocket money?
2. Min wanted to save a total of $2160. How many more months did she need in order to save this amount?

(a)
Total amount that Roshel saved more than Min
= 1750 - 1350
= $400

Number of months taken for each of them to save their amounts
= 400 ÷ 40
= 10

Amount that Roshel saved each month
= 1750 ÷ 10
= $175

Roshel's monthly pocket money
= 175 + 140
= $315

(b)
Min's monthly pocket money
= 315 - 40
= $275

Amount that Min saved each month
= 275 - 140
= $135

Remaining amount that Min needed to save
= 2160 - 1350
= $810

Number of more months that Min needed to save the remaining $810
= 810 ÷ 135
= 6

Answer(s): (a) $315; (b) 6