Given:
a.) Clyde ordered two sweaters ($39.50 each).
b.) He had to pay 4% sales tax and a shipping charge of $3.50.
Step 1: Let's first determine the total cost of sweaters that Clyde ordered:
Step 2: Let's determine the sales tax.
Step 3: Let's add all.
Therefore, the total amount is $85.66
The answer is letter C.