Wendy received $80 more pocket money than Erika each month. Both of them spent $150 per month and saved the rest. After a few months, Wendy saved $1610 but Erika only saved $1210.

1. What was Wendy's monthly pocket money?
2. Erika wanted to save a total of $2420. How many more months did she need in order to save this amount?

(a)
Total amount that Wendy saved more than Erika
= 1610 - 1210
= $400

Number of months taken for each of them to save their amounts
= 400 ÷ 80
= 5

Amount that Wendy saved each month
= 1610 ÷ 5
= $322

Wendy's monthly pocket money
= 322 + 150
= $472

(b)
Erika's monthly pocket money
= 472 - 80
= $392

Amount that Erika saved each month
= 392 - 150
= $242

Remaining amount that Erika needed to save
= 2420 - 1210
= $1210

Number of more months that Erika needed to save the remaining $1210
= 1210 ÷ 242
= 5

Answer(s): (a) $472; (b) 5