Select cost information for Gott Corporation is as follows:

	Total cost at 500 units of output	Total cost at 750 units of output
Cost A	$3,250	$4,250
Cost B	$15,000	$22,500
Cost C	$8,250	$8,250

Based on this information, which of the following best describes costs A, B, and C?

	a.	Cost A is a mixed cost; Cost B is a mixed cost; Cost C is a fixed cost
	b.	Cost A is a variable cost; Cost B is a mixed cost; Cost C is a fixed cost
	c.	Cost A is a mixed cost; Cost B is a variable cost; Cost C is a fixed cost
	d.	Cost A is a variable cost; Cost B is a variable cost; Cost C is a fixed cost