Ravena Labs., Inc. makes a single product which has the following standards: Direct materials: 2.5 ounces at $20 per ounce Direct labor: 1.4 hours at $12.50 per hour 3,750 units of compound were produced during the month. There was no beginning direct materials inventory. Direct materials purchased: 12,000 ounces for $225,000. The ending direct materials inventory was 2,000 ounces. Direct labor-hours worked: 5,600 hours at a cost of $67,200. Show all the calculations 1. Compute the materials price variance for October 2. Compute the materials quantity variance for October 3. Compute the labor efficiency variance for October