(6 points) A team is about to sell a new design of T-shirts. From the survey, the team has found the following model for the demand function: 263 D = (x) 1+0.06e0.12x where D(x) is the number of T-shirts sold if each T-shirt is sold forx dollars. Each T-shirt costs the team $3.75 to make. The team has xed costs of $42 for advertising the new T-shirts. Write down the formulas for 300, C(x) and P(x) in full. Do not use any abbreviations. ROE) = C (x) = P(x) =