18. Firms in Japan often employ both high operating and financial leverage because of the use of modem technology and close borrower-lender relationships. Assume the Susaki Company has a sales volume of 100,000 units at a price of $25 per unit; variable costs are $5 per unit and fixed costs are $ 1,500,000. Interest expense is $250,000. What is the degree of combined leverage for this Japanese firm?