Given the following costs for Bently Company, classify each cost as either variable, fixed, or mixed.
Total Cost at
2,000 Units 3,000 Units
Cost A $12,900 $19,350
Cost B 12,300 16,650
Cost C 13,000 13,000
a. Cost A and Cost B are variable; Cost C is fixed.
b. Cost A is variable; Cost B is mixed; Cost C is fixed.
c. Cost A and Cost B are mixed; Cost C is fixed.
d. Cost A is mixed; Cost B is variable; Cost C is fixed.