Final answer:
To calculate the new total cost of the shirts, subtract the discount from the original price and then add the sales tax.
Step-by-step explanation:
To calculate the new total cost of the shirts, we need to first calculate the discount provided by the coupon and then add the sales tax.
- Step 1: Calculate the discount by multiplying the original price of the shirts by 30% (0.3).
- Step 2: Subtract the discount amount from the original price to find the discounted price.
- Step 3: Add the sales tax to the discounted price by multiplying it by 6.5% (0.065).
Using these steps, you can find the new total cost of the shirts.