Redfern Audio produces audio equipment including headphones. At the Campus Facility, it produces two wireless models, Standard and Enhanced, which differ both in the materials and components used and in the labor skill required. Data for the Campus Plant for the third quarter follow. Units produced Machine-hours Direct labor-hours Standard 27,900 16,740 20,925 Enhanced Total 9,300 37,200 11,160 27,900 Direct materials costs Direct labor costs $ 558,000 334,800 20,925 $ 837,000 711,450 41,850 $ 1,395,000 1,046,250 786,780 Manufacturing overhead Total costs Required: $ 3,228,030 Compute the predetermined overhead rate assuming that Redfern Audio uses direct labor costs to allocate overhead costs. Note: Round your answer to 2 decimal places. Predetermined overhead rate % of direct labor cost