You are buying shoes online. The selling price is $29.99. Round to the nearest penny if necessary. a. The sales tax is 6.5%. What is the total cost? b. The cost of shipping is 15% of the total cost. What is the total cost plus shipping? c. If the total cost plus shipping is greater than $35, then you receive a 10% discount off the original selling price. Do you qualify? If so, what is the new total cost plus shipping?