Assume that Corn Co. sold 6,500 units of Product A and 3,500 units of Product B during the past year. The unit contribution margins for Products A and B are $31 and $60, respectively. Corn has fixed costs of $381,000. The break-even point in units is

a. 11,111 units

b. 13,888 units

c. 9,259 units

d. 7,407 units