a) A firm has fixed operating costs of $650,000, a sales price per unit of $20, and a variable cost per unit of $13. At a base sales level of 500,000 units, the firm's degree of operating leverage is ________. b) A corporation has $5,000,000 of 10 percent bonds and $3,000,000 of 12 percent preferred stock outstanding. The firm's financial breakeven (assuming a 40 percent tax rate) is _______. please show how u arrived to the