10. Assume a firm increases its revenue by S325 while increasing its cost of goods sold by $200. How much additional tax will the firm owe if its marginal tax rate is 25%? A. $22.5 B. $13.75 C. $7.50 D. $31.25 11. Corporate managers are expected to make corporate decisions that are in the best interest of: A. top corporate management. B. the corporation's shareholders. C. the corporation's board of directors. D. all corporate employees. 12. An investment offers to pay $500 a year forever starting at the end of year 6. If the interest rate is 8%, what is the investment's value today? (Assume annual compounding) A. $8,250.00 B. $9,070.29 C. $7,787.71 D. $4253.64