If a manufacturer decides to lower price by 20%, by how much will it have to increase sales to keep the same total contribution if its current GMC% is 40% and its per-unit COGS is $50? A. 100% B. 60% None of the above, and I don't have the information I need to solve this problem. C. None of the above, but I do have the information I need to solve this problem. OD QUESTION 14 How many additional units must a car dealer sell to cover a $100,000 advertising campaign if its normal margin is $1000 on a $50,000 car? None of the above, but I do have the information I need to solve this problem. A B. 100 cars C. 2 cars None of the above, and I don't have the information I need to solve this problem. OD