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 30,000 Enhanced Total 10,000 40,000 18,000 12,000 30,000 22,500 22,500 45,000 Direct materials costs. Direct labor costs $ 600,000 360,000 $900,000 $ 1,500,000 765,000 1,125,000 Manufacturing overhead 720,000 $3,345,000 Total costs Required: 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