At a price of S70, the estimated monthly sales of a product are 15.000 units. Variable costs include manufacturing costs of $25 and distribution costs of SS. Fixed costs are $80,000 per month Required Select and copy the following question parts (A, B, and C) into the text box below and answer the question parts: (show your work to be considered for partial credit) Determine each of the following values: A. Unit contribution margin- B. Monthly break-even unit sales - C. Monthly margin of safety in units =