Final answer:
To determine the final cost of a desk on sale for 20% off with a 7% sales tax, first find the sale price by subtracting the discount from the original price, then calculate the sales tax based on the sale price, and finally, add the tax to the sale price to get the total cost.
Step-by-step explanation:
Calculating the Sale Price and Sales Tax
To calculate the final cost of a desk that is on sale for 20% off, with a 7% sales tax, you need to follow two main steps. First, calculate the sale price of the desk by reducing the original price by 20%. Second, calculate the sales tax on the reduced price by converting the percent to a decimal and multiplying it by the sale price of the desk.
Step-by-Step Calculation
- Find the sale price: $276 × 0.20 = $55.20. Subtract this discount from the original price: $276 - $55.20 = $220.80.
- Calculate the sales tax: $220.80 × 0.07 = $15.456. Round this to the nearest cent to get $15.46.
- Add the sales tax to the sale price to get the total cost: $220.80 + $15.46 = $236.26.
Therefore, the total cost of the desk on sale, including the sales tax, would be $236.26.