Given the following costs for Harper Company, classify each cost as variable, fixed, or mixed.

	Total cost at
	4,000 units	6,000 units
Cost A	$12,300	$16,650
Cost B	17,200	25,800
Cost C	13,000	13,000

Question 16 options:

	Cost A and Cost B are mixed; Cost C is fixed.
	Cost A and Cost B are variable; Cost C is fixed.
	Cost A is mixed; Cost B is variable; Cost C is fixed.
	Cost A is variable; Cost B is mixed; Cost C is fixed.