Nell Corporation manufactures computers. Assume that Nell: allocates manufacturing overhead based on machine hours estimated 12,000 machine hours and exist87,000 of manufacturing overhead costs actually used 13,000 machine hours and incurred the following actual costs: What is Nell's predetermined overhead allocation rate? A. exist6.46/machine hour B. exist7.25/machine hour C. exist7.00/machine hour D. exist6.69/machine hour