During a sale, the discount given by Boutique D and Boutique E are as shown:
Boutique D - Discount of $8 for every $40 spent
Boutique E - 25% off Storewide

1. Jaslyn wants to buy a vest. The price of the vest before discount in both shops is $390. What is the savings that Jaslyn makes if she buys at the shop that sells the same vest cheaper?
2. Kathy bought a skirt and a shirt from Boutique D and paid $288. What was the total cost of the skirt and the shirt before the discount?
3. The price of the same shirt after discount at Boutique E is $109.50. Given that the price of the shirt before discount is the same in both boutiques, what is the percentage discount given to the shirt at Boutique D? Round off the answer to 1 decimal place.

(a)
Amount to pay at Boutique D for every $40 spent
= 40 - 8
= $32

Number of sets of $40 in $390
= 390 ÷ 40
= 9 r 30

Discounted price of the vest at Boutique D
= 9 x 32 + 30
= $318

Discounted price of the vest at Boutique E
= 75% x 390 
= ⁷⁵₁₀₀ x 390 
= $292.50

Amount of savings
= 318 - 292.50
= $25.50

(b)
Number of sets of $32 in $288
= 288 ÷ 32
= 9

Total cost of the skirt and the shirt
= 9 x 40
= $360

(c)

	Boutique D	Boutique E
Original Price	$146	$146
Discount	- $24	- 25%
Discounted Price	$122	$109.50

Original price of the shirt at Boutique E before discount
= 109.50 ÷ ⁷⁵₁₀₀
= $146

If the original price of the shirt at Boutique D and Boutique E is the same, the original price of the shirt at Boutique D is $146.

Number of sets of $40 in $146
= 146 ÷ 40
= 3 r 26

Discounted price of the shirt at Boutique D
= 3 x 32 + 26
= $122

Discount given for the shirt at Boutique D
= 146 - 122
= $24

Percent discount given to the shirt at Boutique D
= 100% x ²⁴₁₄₆ 
≈ 16.4%

Answer(s): (a) $25.50; (b) $360; (c) 16.4%