The St. Augustine Corporation originally budgeted for S360,000 of fixed overhead at 100% normal production capacity Production was budgeted to be 12,000 units. The standard hours for production were 5 hours per unit. The variable overhead rate was $3 per hour. Actual fixed overhead was $360,000 and actual variable overhead was $170,000. Actual production was 11,700 units. The fixed factory overhead volume variance is Oa. $9,000 favorable Ob.$9,000 unfavorable c, ss,500 favorable O d.$5,500 unfavorable