Sashimi Company uses a standard cost accounting system in its glass division. The standard cost of making one glass windshield is: Direct materials (60 lbs. @ P 1/1b) P 60.00 Direct labor (3 hr. @P 10/hr) 30.00 Manufacturing overhead (3 hr. @ P 8/hr) 24.00 Total standard unit cost P 114.00 The current variable manufacturing overhead rate is P3 per labor hour and the budgeted fixed manufacturing overhead is P 2,700. During July, the division produced 165 windshields compared to normal capacity of 180 windshields. The actual production cost was: Direct materials (9,000 lbs) P 10,800.00 Direct labor (500 hrs) 4,000.00 Manufacturing overhead (50% fixed) 5.200.00 Total actual cost P 20,000.00 What is the materials usage variance? P 1,080 debit OP 900 credit OP 1,080 credit P 900 debit