please explain

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 33,000 direct labor-hours would be required for the period's estimated level of production. The company also estimated $559,000 of fixed manufacturing overhead cost for the coming period and variable manufacturing overhead of $3.00 per direct labor-hour. Harris's actual manufacturing overhead cost for the year was $721,570 and its actual total direct labor was 33,500 hours. Required: Compute the company's plantwide predetermined overhead rate for the year. (Round your answer to 2 decimal places.) Predetermined overhead rate $ 16.94 per DLH