Question 5. (2+1+6) a) How do managers plan variable overhead costs and fixed overhead costs? b) What variances can be calculated for variable overhead costs? c) Different management levels in Dates, Inc., require varying degrees of managerial accounting information. Because of the need to comply with the managers' requests, four different variances for manufacturing overhead are computed each month. The information for the September overhead expenditures is as follows: Required: a. Compute Variable overhead spending and Efficiency and Fixed overhead spending and Fixed overhead production volume variance for the plant controller