The standard costs and actual costs for factory overhead for the manufacture of 2,500 units of actual production are as follows:

Standard Costs
Fixed overhead (based on 10,000 hours)	3 hours per unit @ $0.75 per hour
Variable overhead	3 hours per unit @ $1.97 per hour
Actual Costs
Total variable cost, $17,900
Total fixed cost, $8,000

The amount of the total factory overhead cost variance is

a.$5,000 favorable

b.$5,000 unfavorable

c.$3,125 unfavorable

d.$6,875 favorable