A company sells musical instruments. Assume the following information comes from the company's prior year records: Required: a. In general, explain what is the cost-volume-profit analysis and when is it particularly useful? b. For the company in this example, determine the annual break-even dollar sales volume. c. For the company in this example, determine the current margin of safety in dollars. d. Prepare a cost-volume-profit graph for the company in this example. Label both axes in dollars with maximum values of $1,000,000. Draw a vertical line on the graph for the current ($800,000) sales level, and label total variable costs, total fixed costs, and total profits at $800,000 sales. e. For the company in this example, what is the annual break-even dollar sales volume if management makes a decision that increases fixed costs by $60,000