Eric goes to the store to buy ingredients for dinner. He needs ground beef, shredded cheese, salsa, and tortillas. The ground beef costs $3.79, the shredded cheese costs $2.69, the salsa costs $3.77, and the tortillas cost $1.50. He has the following coupons: off ground beef, $0.50 off shredded cheese, and $1.00 off salsa. Part A: What is the total cost of the items before Eric uses the coupons?

Part B: What is the total of all of the coupons?

Part C: How much will Eric pay after he uses the coupons?`