Fanny received $90 more pocket money than Sabrina each month. Both of them spent $160 per month and saved the rest. After a few months, Fanny saved $1560 but Sabrina only saved $1200.

1. What was Fanny's monthly pocket money?
2. Sabrina wanted to save a total of $2100. How many more months did she need in order to save this amount?

(a)
Total amount that Fanny saved more than Sabrina
= 1560 - 1200
= $360

Number of months taken for each of them to save their amounts
= 360 ÷ 90
= 4

Amount that Fanny saved each month
= 1560 ÷ 4
= $390

Fanny's monthly pocket money
= 390 + 160
= $550

(b)
Sabrina's monthly pocket money
= 550 - 90
= $460

Amount that Sabrina saved each month
= 460 - 160
= $300

Remaining amount that Sabrina needed to save
= 2100 - 1200
= $900

Number of more months that Sabrina needed to save the remaining $900
= 900 ÷ 300
= 3

Answer(s): (a) $550; (b) 3