Stormy Company established the following standards with respect to one of its products: 12 Std Qty 4.0 2.0 1.0 Direct materials (pounds) Direct labor (hours) Variable overhead (applied using machine hours (MH)) Std price.(rate) $4.00 $10.00 $1.80 Std. cost $16.00 $20.00 $1.80 8 00:45:28 $37.80 Actual results for the past quarter were as follows (there was no beginning direct materials inventory): Units produced Direct materials purchased (pounds) Direct materials purchased (dollars) Direct materials used (pounds) Direct labor hours incurred Direct labor cost Variable overhead costs Machine hours (MH) incurred 500 2,800 $10.920 2.100 950 $9,025 $960 480 Calculate the variable overhead quantity (efficiency) variance for the quarter