Pinacle Corp. budgeted $240,550 of overhead cost for the current year. Actual overhead costs for the year were $215,420. Pinacle's plantwide allocation base, machine hours, was budgeted at 53,640 hours. Actual machine hours were 55,160. A total of 96,670 units was budgeted to be produced and 98,000 units were actually produced. Pinacle's plantwide factory overhead rate for the current year is: a. $4.48 per machine hour b. $4.02 per machine hour c. $2.23 per machine hour d. $2.49 per machine hour