Coronado 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 $14 per hour. In August, Coronado Co. Purchased 11910 boards for a total cost of $123100. It used 11410 boards to manufacture 1860 boxes. Total labour hours were 1040 hours, and total labour costs were $16450. What was the labour quantity variance for August? O $1540 F 0 $1540 U $11480 F O $11480 V