The manager of a restaurant found that the cost to produce 300 cups of coffee is $28.95, while the cost to produce 400 cups is $38.15. Assume the cost C(x) is a linear function of x, the number of cups produced. Answer parts a and b. E) a. Find a formula for C(x). Choose the correct answer below. 000 = D (Use integers or decimals for any numbers in the expression.) b. Find the total cost of producing 1000 cups. The total cost of producing 1000 cups is $|:|. (Type an integer or decimal rounded to two decimal places as needed.)