I can't figure out part two to this question. The optimal packaging size is 6 units, but I am not sure the optimal packaging size price.

The American Baker's Association reports that annual sales of bakery goods last year rose 15 percent, driven by a 50 percent increase in the demand for bran muffins. Most of the increase was attributed to a report that diets rich in bran help prevent certain types of cancer. You are the manager of a bakery that produces and packages gourmet bran muffins, and you currently sell bran muffins in packages of three. However, as a result of this new report, a typical consumer's inverse demand for your bran muffins is now P= 11 - 1.5Q. If your cost of producing bran muffins is C(Q) = 2.0Q, determine the optimal number of bran muffins to sell in a single package and the optimal package price. Instruction: Enter your response for the optimal package price rounded to two decimal places. Optimal package size: 6 units Optimal package price: $