Sheridan Co. produces wooden boxes. The company's standards per box require 5 boards, each costing $10 per board, and half of an hour of direct labour. The standard labour rate is $16 per hour. In August, Sheridan Co. purchased 11970 boards for a total cost of $123700. It used 11440 boards to manufacture 1880 boxes. Total labour hours were 900 hours, and total labour costs were $16250. What was the total labour variance for August? $1.60F$1.60U$1210F$1210U