A furniture store was having Chinese New Year discount of 15% off its usual price. The GST is at 5%. Yoko used her credit card to purchase a book shelf and Julian used cash to pay for a similar book shelf.
- How much did Yoko pay in the end after GST? Round off your answer to the nearest cent.
- How much did Julian pay in the end after GST? Round off your answer to the nearest ten cent.
New book shelf Usual Price: $400 |
Further Discount: Pay by credit card: 10% off discounted price before GST!
Pay by cash: $30 off discounted price before GST! |
|
Credit Card |
Cash |
Usual Price |
$400 |
$400 |
Less 15% discount |
- $60.00 |
- $60.00 |
Price after 15% discount |
$340.00 |
$340.00 |
Less further discount |
- $34.00 |
- $30 |
Price after further discount |
$306.00 |
$310.00 |
Price after GST of 5% |
$321.30 |
$325.50 |
(a)
New selling price after 15% discount
= 100% - 15%
= 85%
Price of the book shelf after Chinese New Year discount
= 85% x 400
=
90100 x 400
= $340.00
New selling price after 10% further discount
= 100% - 10%
= 90%
Price of the book shelf after credit card discount
= 90% x 340.00
=
90100 x 340.00
= $306.00
Price to pay after including GST
= 100% + 5%
= 105%
Price of the book shelf after GST
= 105% x 306.00
=
105100 x 306.00
≈ $321.30 (Round off to nearest cent)
(b)
Price of the book shelf after cash discount
= 340.00 - 30
= $310.00
Price of the book shelf after GST
= 105% x 310.00
=
105100 x 310.00
≈ $325.50 (Round off to nearest ten cent)
Answer(s): (a) $321.30; (b) $325.50