please answer all 4 multiple choice questions

In a cost-volume-profit graph, the total cost line meets the Y (vertical) axis at the: a. variable cost per unit point. b. total sales revenues point. c. total fixed costs point. d. total mixed costs point. Which of the following equations is used to calculate the degree of operating leverage? a. Degree of Operating Leverage = Operating Income / Total Contribution Margin b. Degree of Operating Leverage = Total Fixed Cost / Operating Income c. Degree of Operating Leverage = Total Contribution Margin / Operating Income d. Degree of Operating Leverage = Operating Income / Total Fixed Cost The process of building a package contribution margin is followed in: a. the sales revenue approach in a multiple-product setting. b. the units sold approach in a multiple-product setting. c. the sales revenue approach in a single product setting. d. the units sold approach in single-product setting. The Northern Co. manufactures office chairs. The following information is available for June: Selling price per chair Variable cost per chair Total fixed costs $150 80 102,000 (Round-off the answer to the nearest whole number) If the company sells 1,600 chairs in the month of June, the margin of safety in units is a. 134 chairs b. 143 chairs c. 124 chairs d. 114 chairs