"hank is a salaried plus commission employee. hank has a monthly salary of $2,500 and earns 5.5% commission on all sales. which of the following expressions represents hank's total earnings in one month if he has $6,300 in sales?
a. 2,500 + (0.055)(6,300)
b. 2,500 + (5.5)(6,300)
c. (2,500) (5.5) + 6,300
d. (2,500) (0.055) + 6,300