Milner Manufacturing uses a job-order costing system. On May 1, the company has a balance in Work in Process Inventory of $3,700 and two jobs in process: Job No. 429 $2,150, and Job No. 430 $1,550. During May, a summary of source documents reveals the following: Job Number Materials Requisition Slips Labour Time Tickets 429 $2,390 $2,180 430 3,820 3,370 431 4,700 $10,910 7,610 $13,160 General use 1,060 1,740 $11,970 $14,900 Milner Manufacturing applies manufacturing overhead to jobs at an overhead rate of 60% of direct labour cost. Job No. 429 is completed during the month.