IMC Moodle System My courses Dashboard > My courses > Top Master of Business Subjects > 2022 Term1 TACC607 ST > Week 5 (25 Apr-1 May)-Make-up Class on 27 Apr 2022 Question 18 Not yet answered Marked out of 5.00 Flag question Assume a firm uses job costing. Which of the following is NOT a good reason to use departmental overhead rates rather than a single plantwide rate? Oa. Overhead costs in some departments are a very large proportion of total department cost, but are a very small proportion in other departments. Ob. The firm makes multiple products using common equipment and employees Oc Total overhead costs amount to about 5 per cent of total prime costs Od. The various products made by the firm follow different sequences of manufacturing activities