Discount, Tip, and Taxes

Discounts should be calculated using \((1-\%\;\mathrm{discounted})\). The 1 stands for 100% of the item, so we are subtracting the discount from the total item.

Tips and taxes should be calculated using \((1+\%\;\mathrm{tip}\;\mathrm{or}\;\mathrm{tax})\). The 1 again stands for 100% of the original item, so we are adding on the tip or tax to that.

Example:

Sarah buys a laptop for 980 dollars, but she also must pay a 6% sales tax. How much did her total purchase cost her? (Round to the nearest dollar)

A) 986
B) 1,006
C) 1,039
D) 1,048