Harris Fabrics computes its plantwide predetermined overhead rate annually on the basis of direct labor-hours. At the beginning of the year, it estimated that 30,000 direct labor-hours would be required for the period's estimated level of production. The company also estimated $522,000 of fixed manufacturing overhead cost for the coming period and variable manufacturing overhead of $2.00 per direct labor-hour. Harris's actual manufacturing overhead cost for the year was $638,975 and its actual total direct labor was 30,500 hours