Zero Company's standard factory overhead rate is $3.75 per direct labor hour (DLH), calculated at 90% capacity = 900 standard DLHs. In December, the company operated at 80% of capacity, or 800 standard DLHs. Budgeted factory overhead at 80% of capacity is $3,150, of which $1,350 is fixed overhead. For December, the actual factory overhead cost was $3,800 for 840 actual DLHs, of which $1,300 was for fixed factory overhead. What was the fixed factory overhead spending variance (to the nearest whole dollar) for Zero Company in December? Multiple Choice $50 favorable. $225 favorable. $425 unfavorable. $560 unfavorable. $610 unfavorable