A furniture store was having National Day discount of 30% off its usual price. The GST is at 4%. Nora used her credit card to purchase a kitchen table and Asher used cash to pay for a similar kitchen table.

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

New kitchen table Usual Price: $260

Further Discount: Pay by credit card: 10% off discounted price before GST! Pay by cash: $70 off discounted price before GST!

	Credit Card	Cash
Usual Price	$260	$260
Less 30% discount	- $78.00	- $78.00
Price after 30% discount	$182.00	$182.00
Less further discount	- $18.20	- $70
Price after further discount	$163.80	$112.00
Price after GST of 4%	$170.35	$116.50

(a)
New selling price after 30% discount
= 100% - 30%
= 70%

Price of the kitchen table after National Day discount
= 70% x 260
= ⁹⁰₁₀₀ x 260
= $182.00

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

Price of the kitchen table after credit card discount
= 90% x 182.00
= ⁹⁰₁₀₀ x 182.00
= $163.80

Price to pay after including GST
= 100% + 4%
= 104%

Price of the kitchen table after GST
= 104% x 163.80 
= ¹⁰⁴₁₀₀ x 163.80 
≈ $170.35 (Round off to nearest cent)

(b)
Price of the kitchen table after cash discount
= 182.00 - 70
= $112.00

Price of the kitchen table after GST
= 104% x 112.00 
= ¹⁰⁴₁₀₀ x 112.00 
≈ $116.50 (Round off to nearest ten cent)

Answer(s): (a) $170.35; (b) $116.50