please answer these questions for my accounting

HighTide Canvas Company currently makes and sells two model sizes of a boat cover. Data applicable to the current operation are summarized in the following columns labeled Current Operation. Management is considering adding a Medium model to its current Large and Small models. Expected data if the new model is added are shown in the following columns labeled Proposed Expansion: Required: a. Calculate the company's current total contribution margin and the current average contribution margin ratio. b. Calculate the company's current amount of operating income. c. Calculate the company's current breakeven point in dollar sales. d. Calculate the company's total operating income under the proposed expansion. e. Based on the proposed expansion data, would you recommend adding the Medium model? f. Would your answer to part (e) change if the Medium model sales volume were to increase to 1,000 units annually and all other data remained the same? g. At what level of annual sales volume (in units) would you accept the proposed expansion by adding the Medium model? Explain your anslysis