The following standards for variable manufacturing overhead have been established for Sandhill, Inc. a manufacturer of reproduction vintage hats: The following data pertain to operations for the month of July. Calculate the variable overhead spending variance and the variable overhead efficlency variance for July and indicate whether the variances are favorable or unfavorable. Calculate the variable overhead spending variance and the variable overhead efficiency variance for July and indicate whether the variances are favorable or unfavorable. Variable overhead spending variance Variable overhead efficiency variance \$