Pinnacle Corp. budgeted $235,450 of overhead cost for the current year. Actual overhead costs for the year were $223,040. Pinnacle's plantwide allocation base, machine hours, was budgeted at 45,770 hours. Actual machine hours were 51,400 . A total of 96,570 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. S2.31 per machine hour b. $5.14 per machine hour c. $4.87 per machine hour d. $2.44 per machine hour