Beta Enterprise developed standard costs for direct material and direct labour. In 2021, Beta estimated the following standard costs for one of their major products. Budgeted quantity Budgeted price Direct materials 0.67 pounds $70 per pound Direct labour 0.18 hours $30.97 per hour During the month of April, Beta produced and sold 24860 units of a product, using 22139 pounds of direct materials at an average cost per pound of $78 and 9801 direct manufacturing labour-hours at an average wage of $33.40 per hour. The direct manufacturing labour rate variance during April is ?