Calculating Costs and Break-Even: Night Shades, Inc. (NSI), manufactures biotech sunglasses. The variable materials cost is $9.64 per unit, and the variable labor cost is $8.63 per unit. a. What is the variable cost per unit? b. Suppose NSI incurs fixed costs of $915,000 during a year in which total production is 215,000 units. What are the total costs for the year? c. If the selling price is $39.99 per unit, does NSI break even on a cash basis? If depreciation is $465,000 per year, what is the accounting break-even point? Please show calculation and formula use. thank you.