St. Augustine Corporation originally budgeted for $360,000 of fixed overhead at 100% of 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. 15.500 unterble Ob $9.000 unfavenble Oc 59,000 favorable Od. $5,500 favorable