A furniture store was having Grand Opening discount of 15% off its usual price. The GST is at 7%. Ivory used her credit card to purchase a study table and Riordan used cash to pay for a similar study table.
- How much did Ivory pay in the end after GST? Round off your answer to the nearest cent.
- How much did Riordan pay in the end after GST? Round off your answer to the nearest ten cent.
New study table Usual Price: $560 |
Further Discount: Pay by credit card: 10% off discounted price before GST!
Pay by cash: $80 off discounted price before GST! |
|
Credit Card |
Cash |
Usual Price |
$560 |
$560 |
Less 15% discount |
- $84.00 |
- $84.00 |
Price after 15% discount |
$476.00 |
$476.00 |
Less further discount |
- $47.60 |
- $80 |
Price after further discount |
$428.40 |
$396.00 |
Price after GST of 7% |
$458.39 |
$423.70 |
(a)
New selling price after 15% discount
= 100% - 15%
= 85%
Price of the study table after Grand Opening discount
= 85% x 560
=
90100 x 560
= $476.00
New selling price after 10% further discount
= 100% - 10%
= 90%
Price of the study table after credit card discount
= 90% x 476.00
=
90100 x 476.00
= $428.40
Price to pay after including GST
= 100% + 7%
= 107%
Price of the study table after GST
= 107% x 428.40
=
107100 x 428.40
≈ $458.39 (Round off to nearest cent)
(b)
Price of the study table after cash discount
= 476.00 - 80
= $396.00
Price of the study table after GST
= 107% x 396.00
=
107100 x 396.00
≈ $423.70 (Round off to nearest ten cent)
Answer(s): (a) $458.39; (b) $423.70