During a sale, the discount given by Stall L and Stall M are as shown:
Stall L - Discount of $5 for every $25 spent
Stall M - 25% off Storewide

1. Mary wants to buy a sweater. The price of the sweater before discount in both shops is $410. What is the savings that Mary makes if she buys at the shop that sells the same sweater cheaper?
2. Roshel bought a coat and a shirt from Stall L and paid $80. What was the total cost of the coat and the shirt before the discount?
3. The price of the same shirt after discount at Stall M is $118.50. Given that the price of the shirt before discount is the same in both stalls, what is the percentage discount given to the shirt at Stall L? Round off the answer to 1 decimal place.

(a)
Amount to pay at Stall L for every $25 spent
= 25 - 5
= $20

Number of sets of $25 in $410
= 410 ÷ 25
= 16 r 10

Discounted price of the sweater at Stall L
= 16 x 20 + 10
= $330

Discounted price of the sweater at Stall M
= 75% x 410 
= ⁷⁵₁₀₀ x 410 
= $307.50

Amount of savings
= 330 - 307.50
= $22.50

(b)
Number of sets of $20 in $80
= 80 ÷ 20
= 4

Total cost of the coat and the shirt
= 4 x 25
= $100

(c)

	Stall L	Stall M
Original Price	$158	$158
Discount	- $30	- 25%
Discounted Price	$128	$118.50

Original price of the shirt at Stall M before discount
= 118.50 ÷ ⁷⁵₁₀₀
= $158

If the original price of the shirt at Stall L and Stall M is the same, the original price of the shirt at Stall L is $158.

Number of sets of $25 in $158
= 158 ÷ 25
= 6 r 8

Discounted price of the shirt at Stall L
= 6 x 20 + 8
= $128

Discount given for the shirt at Stall L
= 158 - 128
= $30

Percent discount given to the shirt at Stall L
= 100% x ³⁰₁₅₈ 
≈ 19%

Answer(s): (a) $22.50; (b) $100; (c) 19%