Question 1016820

list price = p


sale price = p - .15 * p = (1 - .15) * p = .85 * p.


tax on sale price = .08 * .85 * p = .068 * p.


total price = sale price + tax on sale price becomes:


total price = .85 * p + .068 * p = (.85 + .068) * p = .918 * p.


he paid .918 * p for the computer.


this price included the tax on the sale price.


for example:


if the list price was 250 dollars, then he paid .918 * 250 = 229.5.


the list price was 250.
the sale price was .85 * 250 = 212.5
the tax on the sale price was .08 * 212.5 = 17
the total price was the sale price plus the tax on the sale price = 212.5 + 17 = 229.5.