The Laramie Corporation manufactures a custom pair of boots, whose manufacture consumes a large amount of variable manufacturing overhead. For the month of October, Laramie produced 15,250 pair of custom boots. The standard costs developed for the custom boots by Laramie, as well as actual information, follow. Actual overhead hours per unit 4 Standard overhead hours per unit 6 Actual variable overhead rate per hour $6.00 Standard variable overhead rate per hour $5.50 What was the variable manufacturing overhead efficiency variance for Laramie's custom boots in October