A furniture store was having Grand Opening discount of 10% off its usual price. The GST is at 7%. Julie used her credit card to purchase a breakfast hutch and Tim used cash to pay for a similar breakfast hutch.

1. How much did Julie pay in the end after GST? Round off your answer to the nearest cent.
2. How much did Tim pay in the end after GST? Round off your answer to the nearest ten cent.

New breakfast hutch Usual Price: $760

Further Discount: Pay by credit card: 10% off discounted price before GST! Pay by cash: $10 off discounted price before GST!

	Credit Card	Cash
Usual Price	$760	$760
Less 10% discount	- $76.00	- $76.00
Price after 10% discount	$684.00	$684.00
Less further discount	- $68.40	- $10
Price after further discount	$615.60	$674.00
Price after GST of 7%	$658.69	$721.20

(a)
New selling price after 10% discount
= 100% - 10%
= 90%

Price of the breakfast hutch after Grand Opening discount
= 90% x 760
= ⁹⁰₁₀₀ x 760
= $684.00

New selling price after 10% further discount
= 100% - 10%
= 90%

Price of the breakfast hutch after credit card discount
= 90% x 684.00
= ⁹⁰₁₀₀ x 684.00
= $615.60

Price to pay after including GST
= 100% + 7%
= 107%

Price of the breakfast hutch after GST
= 107% x 615.60 
= ¹⁰⁷₁₀₀ x 615.60 
≈ $658.69 (Round off to nearest cent)

(b)
Price of the breakfast hutch after cash discount
= 684.00 - 10
= $674.00

Price of the breakfast hutch after GST
= 107% x 674.00 
= ¹⁰⁷₁₀₀ x 674.00 
≈ $721.20 (Round off to nearest ten cent)

Answer(s): (a) $658.69; (b) $721.20