For a Large Firm That Produces and Sells Automobiles, Which

Multiple Choice

For a large firm that produces and sells automobiles, which of the following costs would be a variable cost?

A) the unemployment insurance premium that the firm pays to the state of Missouri that is calculated based on the number of worker-hours that the firm uses
B) the cost of the steel that is used in producing automobiles
C) the cost of the electricity of running the machines on the factory floor
D) All of the above are correct.