The Gabbana Companys maintenance costs are a mixed cost. At the low level of activity (50 direct labor hours), maintenance costs are $600. At the high level of activity (100 direct labor hours), maintenance costs are $1,100. Using the high-low method, the variable maintenance cost per unit would be ________ and the total fixed maintenance cost would be _________.

Select one:

a. $10,$500

b. $11,$220

c. $15,$400

d. $10,$100