Which of the following is false? Overhead costing accuracy is improved by the use of multiple departmental rates rather than a single overhead rate. The departmental overhead rate method and the plantwide overhead rate method both comply with GAAP and can be used for external reporting The departmental overhead rate method does not assign overhead on the basis of volume-related measures. The departmental overhead method assigns overhead on the basis of volume-related measures. The departmental overhead rate method uses more overhead rates than the plantwide overhead rate method