Lebron Co. manufactures product X with the following standard costs: Direct materials, 20 yards @ 13.50 per yard 270 Direct labor, 4 hours @ 90.00 per hour 360 The following information pertains to the month of May: Direct materials, 18,000 yards @ 13.80 per yard 248,400 Direct labor, 2,100 hours @ 91.50 per hour 192,150 Direct materials used 9,500 yards Production during May 500 units What is the direct labor rate variance?