[The following information applies to the questions displayed below.] Charlevoix Cases makes mobile phone cases. The company has collected the following price and cost characteristics: Exercise 3-33 (Algo) Basic Decision Analysis Using CVP (LO 3-1) Required: a. How many cases must Charlevoix sell annually to break even? Note: Do not round intermediate calculations. Round final answer to nearest whole unit. b. How many cases must Charlevoix sell annually to make an operating profit of $47,840 ? Note: Do not round intermediate calculations. Round final answer to nearest whole unit