Tiffany received $60 more pocket money than Erika each month. Both of them spent $170 per month and saved the rest. After a few months, Tiffany saved $1760 but Erika only saved $1280.

1. What was Tiffany's monthly pocket money?
2. Erika wanted to save a total of $2240. How many more months did she need in order to save this amount?

(a)
Total amount that Tiffany saved more than Erika
= 1760 - 1280
= $480

Number of months taken for each of them to save their amounts
= 480 ÷ 60
= 8

Amount that Tiffany saved each month
= 1760 ÷ 8
= $220

Tiffany's monthly pocket money
= 220 + 170
= $390

(b)
Erika's monthly pocket money
= 390 - 60
= $330

Amount that Erika saved each month
= 330 - 170
= $160

Remaining amount that Erika needed to save
= 2240 - 1280
= $960

Number of more months that Erika needed to save the remaining $960
= 960 ÷ 160
= 6

Answer(s): (a) $390; (b) 6