Nexus Industries uses a standard costing system to apply manufacturing costs to its production process. In May, Nexus anticipated producing 2,050 units with fixed manufacturing overhead costs allocated at $6.30 per direct labor hour with a standard of 2 direct labor hours per unit. In May, actual production was 2.500 units and actual fixed manufacturing overhead costs were $21,000. What was Nexus' fixed manufacturing overhead volume variance in May? O A. $4,830 unfavorable OB. $5,670 favorable O C. $5,670 unfavorable OD. $4,830 favorable