1A. What is the total cost of a sweatshirt if the regular price is 42$ and the sales tax is 5 1/2%? And here is another one as well think of it as 1B.
1B. Scoutt wants to tip his taxicab driver 20% if his commute costs $15 , what is the total cost

Last One... I Think. 1C
1C. Find the total cost of a spa treatment of 42$ including 6% tax and 20% tip.