could someone please explain how to do this one

JOD NO. 469 Item: White Lion Cages For: Zawadi Company 2,000 Date Requested: 7/2 Date Completed: 7/31 Manufacturing Overhead Direct Materials Direct Labour Date 7/10 $890 12 940 15 $504 $420 350 22 420 24 1,600 1,596 27 31 500 600 Cost of completed job: Direct materials Direct labour Manufacturing overhead Total cost Unit cost (b) Calculate the predetermined manufacturing overhead rate. Predetermined manufacturing overhead rate %