The table shows the prices of tarts at two shops. The tarts are only sold in sets of 7 tarts in Barbara's Bakery or sets of 8 tarts in Shiyun's Bakery.

Shop	Price of tarts
Barbara's Bakery	7 for $15
Shiyun's Bakery	8 for $18

1. Julie has $30.20. She wants to buy 40 tarts from Shiyun's Bakery. How much more money does she need to buy the 40 tarts?
2. Elijah has $56. He wants to buy the greatest possible number of tarts with his money from one of the two shops. What is the greatest possible number of tarts he can buy with his money?

(a)
Number of sets of 8 tarts
= 40 ÷ 8
= 5

Cost of 40 tarts 
= 5 x 18
= $90

Amount that Julie needs more to buy the 40 tarts
= 90 - 30.20
= $59.80

(b)
Number of sets of 7 tarts that Elijah could buy at Barbara's Bakery
= 56 ÷ 15
= 3 r 11

Number of tarts that Elijah could buy at Barbara's Bakery
= 3 x 7
= 21 

Number of sets of 8 tarts that Elijah could buy at Shiyun's Bakery
= 56 ÷ 18
= 3 r 2

Number of tarts that Elijah could buy at Shiyun's Bakery
= 3 x 8
= 24 (More)

Greatest possible number of tarts that Elijah can buy with his money = 24

Answer(s): (a) $59.80; (b) 24