At the end of the year, actual manufacturing overhead costs were $110,000 and applied manufacturing overhead costs were $118,800. If the actual activity for the year was 20,000 machine-hours, and if 22,000 standard machine-hours were allowed for the year's production, the predetermined factory overhead rate per machine-hour was:

a) $5.00. b) $5.94. c) $5.50. d) $5.40.