The following information is available for a company's cost of sales over the last four months. Month Units sold Cost of sales
January 400 $ 31,000
February 800 $ 37,000
March 1,600 $ 49,000
April 2,400 $ 61,000
Using the high-low method, the estimated total fixed cost is:
a. $25,000.
b. $30,000.
c. $13,692.
d. $100,000.
e. $50,000.