A piano manufacturer has a daily fixed cost of $1,000 and a marginal cost of $1,300 per piano. Find the cost C(x) of manufacturing x pianos in one day. C(x) Use your function to answer the following questions. (a) On a given day, what is the cost of manufacturing three pianos? $ (b) What is the cost of manufacturing the third piano that day? $ (c) What is the cost of manufacturing the 11th piano that day? (d) What is the variable cost? What is the fixed cost? $ What is the marginal cost? $ per piano (e) Graph C as a function of x