Last year, Krayler Inc. sold 25,000 units for a total of $750,000 and had net income of $25,000. At the break-even point last year, the company's total contribution margin would have equaled $500,000. What were Krayler's total fixed costs last year? What was Krayler's contribution margin ratio? How many units would Krayler have had to sell last year to break even