Classify the total costs of each of the following as variable, fixed, mixed, or step. Sales volume is the cost driver.

a) Salary of departmet manager

b) Memory chips in computer assembly plant

c)Real estate taxes

d)Salaries of quality inspectors when each inspector can evaluate a maximum of 1,000 unit per day.

e) Wages paid to production employees for the time spent working on products

f) Electric power in factory

g)Raw materials unsed in production

h) Automobiles rented on the basis of a fixed charge per day plus an additional charge per mile driven

I) Sales cpmmisions

J) Depreciation on office equipment.