Oman, Inc., manufactures a single product in which variable manufacturing overhead is assigned on the basis of standard direct labor-hours. The company uses a standard cost system and has established the following standards for one unit of product: Direct materials Direct labor Variable sanufacturing overhead Standard Quantity Standard Price or Rate 5.8 pounds $ 8.68 per pound 0.5 hours $ 33.50 per hour 0.5 hours $ 8.5e per hour Standard Cost $ 3.48 $16.75 $ 4,25 During March, the following activity was recorded by the company: . . The company produced 2.400 units during the month. A total of 19,400 pounds of material were purchased at a cost of $13,580. There was no beginning inventory of materials on hand to start the month; at the end of the month, 3,620 pounds of material remained in the warehouse. . During March, 1,090 direct labor-hours were worked at a rate of $30.50 per hour. Variable manufacturing overhead costs during March totaled $14,061. The direct materials purchases variance is computed when the materials are purchased, The variable overhead efficiency variance for March is