Marigold Co. produces wooden boxes. The companys standards per box require 6 boards, each costing $11 per board, and half of an hour of direct labour. The standard labour rate is $16 per hour. In August, Marigold Co. Purchased 11950 boards for a total cost of $122800. It used 11500 boards to manufacture 1850 boxes. Total labour hours were 1050 hours, and total labour costs were $16400. What was the labour quantity variance for August?