At the beginning of the year, Lopez Company had the following standard cost sheet for one of its chemical products: Lopez computes its overhead rates using practical volume, which is 80, 000 units. The actual results for the year are as follows: a. Units produced: 90, 100 b. Direct labor: 158, 900 hours at $18.10 C. FOH: $926, 000 d. VOH: $119, 900 Required: Compute the variable overhead spending and efficiency variances. Spending variance Efficiency variance Compute the fixed overhead spending and volume variances. Spending variances Volume variances