Pinnacle Corp. budgeted $265,980 of overhead cost for the current year. Actual overhead costs for the year were $253,970. Pinnacle's plantwide allocation base, machine hours, was budgeted at 50,460 hours. Actual machine hours were 42,700. A total of 99,330 units was budgeted to be produced and 98,000 units were actually produced. Pinnacle's plantwide factory overhead rate for the current year is: a. 55.27 per machine hour b. $2.56 per machine hour X c. $2.68 per machine hour d. $5.03 per machine hour