o $50 favorable. o $225 favorable. o $425 unfavorable. o $610 unfavorable. o $650 unfavorable

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. Under a four-way breakdown (decomposition) of the total overhead variance, what is the variable factory overhead spending variance for Zero Company for December (to the nearest whole dollar)?