Montoursville Control Company, which manufactures electrical switches, uses a standard-costing system. The standard production overhead costs per switch are based on direct-labor hours and are as follows Variable overhead (4 direct-labor hours@$14.00 per hour) Fixed overhead (4 direct-labor hours@ $26.00 per hour) $ 56 104 Total overhead $160 Based on capacity of 310,000 direct-labor hours per month The following information is available for the month of October . Variable overhead costs were $5,940,000 Fixed overhead costs were $8,625,000o 74,500 switches were produced, although 77,500 switches were scheduled to be produced 295,000 direct-labor hours were worked at a total cost of $5,825,000. Required Compute the variable-overhead spending and efficiency variances and the fixed-overhead budget and volume variances for October. (Indicate the effect of each variance by selecting "Favorable" or "unfavorable". Select "None" and enter "0" for no effect (i.e., zero variance).) Variable-overhead spending variance Variable-overhead efficiency variance Fixed-overhead budget variance Fixed-overhead volume variance