Final answer:
To find the sale price of Apple Watch bands on a 10% discount, subtract 10% from the original price of one band and multiply by four. To compute sales tax, convert the tax rate to a decimal and multiply by the total sale price, then add this amount to the sale price for the total cost.
Step-by-step explanation:
To calculate the sale price of the Apple Watch bands, you would take the original price of one band, subtract 10% of that price, and then multiply by 4 since you are buying four bands. For example, if one band is originally priced at $50, the sale price of one band would be $50 - ($50 × 10%) = $50 - $5 = $45. Therefore, for four bands, the sale price would be $45 × 4 = $180.
To determine the sales tax, you must know the sales tax rate in your area. Once you have the rate, convert it to decimal form and multiply it by the total sale price of the bands to find the amount of sales tax you would need to add to the sale price. For example, if the sales tax rate is 7%, you would calculate the tax as follows: $180 × 0.07 = $12.60 in sales tax. Hence, the total cost including sales tax would be $180 + $12.60 = $192.60.