The original price of a computer is (p). It is on sale for 15% off.
The store must charge 10% sales tax on the computer after the discount. What is the final cost of the computer?
The discount is calculated by multiplying the original price by (1 - 15%) or (0.85):
Discount Amount = p * 0.85.
After the discount, the final price of the computer is calculated by adding the discount amount to the original price:
Final Price = p * 0.85 + p = 1.85p.
The sales tax is calculated by multiplying the final price by 10% or 0.10:
Sales Tax = (1.85p) * 0.10 = 0.185p.
The final cost of the computer is calculated by adding the sales tax to the final price:
Final Cost = 1.85p + 0.185p = 2.035p.
Therefore, the final cost of the computer is 2.035 times the original price (p).