Single Plantwide Factory Overhead Rate If required, round all per-case answers to the nearest cent. a. Determine the single plantwide factory overhead rate. $ per processing hour If required, round all per-case answers to the nearest cent. a. Determine the single plantwide factory overhead rate. $ per processing hour b. Use the overhead rate in (a) to determine the amount of total and per-case overhead allocated to each of the three products under generally accepted accounting principles