Final answer:
To determine the total cost of the scooter, calculate the 15% discount on the original price, then calculate and add the 8.5% sales tax to the discounted price. After these calculations, the total cost comes to $79.30, making the correct answer B) $79.30.
Step-by-step explanation:
To find the total cost of the scooter after a 15% discount and an 8.5% sales tax, we need to follow these steps:
- Calculate the discount amount by converting the discount percentage to a decimal and multiplying it by the original price.
- Subtract the discount amount from the original price to get the discounted price of the scooter.
- Calculate the sales tax amount by converting the sales tax percentage to a decimal and multiplying it by the discounted price.
- Add the sales tax amount to the discounted price to get the total cost.
Let's apply this to the given problem:
The original price of the scooter is $85.99.
Discount amount = 0.15 × $85.99 = $12.8985, which rounds to $12.90.
Discounted price of the scooter = $85.99 - $12.90 = $73.09.
Next, we calculate the sales tax:
Sales tax amount = 0.085 × $73.09 = $6.21265, which rounds to $6.21.
Finally, the total cost with sales tax = $73.09 + $6.21 = $79.30.
Therefore, the correct answer is B) $79.30.