Given:
Greeting card cost before tax = $4
Discount = 15%
Sales tax = 5%
To find:
How much will the customer pay for the card?
Solution:
It is given that the cost of the greeting card before tax is $4.
After 15% discount, the cost of the greeting card is:
Cost of card after discount



The cost of card after 5% sales tax is:
Cost of card after tax
Therefore, the customer will pay $3.57 for the greeting card.