Answer:
C. $13,100U.
Explanation:
The cost variance is given by the difference between the actual cost of commissions and the projected cost of commissions of 30,000 units at $8 each:
[tex]V = \$253,100-(\$8*30,000)\\V=\$ 13,100\ U[/tex]
Since the actual cost is higher than the anticipated cost, the balance is unfavorable.
Gridiron would report a cost variance of: C. $13,100U.