20. The daily marginal profit function associated with producing and selling TexaPep hot sauce is P'(x) = -0.0006x2 +6 where x denotes the number of cases produced and sold. The definite integral, 120 P'(x)dx, represents: A. The profit realized from the sale of x = 10 goods B. The net change in profit incurred in selling the 21st through 30th goods C. The net change in profit incurred in selling the 1st through 30th goods The profit realized from the sale of 20 goods