Different management levels in Bates 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: Budgeted output units 3,200 units Budgeted fixed manufacturing overhead $20,000 Budgeted variable manufacturing overhead $5.00 per direct labour hour Budgeted direct manufacturing labour hours 2 hours per unit Fixed manufacturing costs incurred $26,000 Direct manufacturing labour hours used 7,200 Variable manufacturing costs incurred $35,600 Actual units manufactured 3,400 REQUIRED: a. Compute a 4-variance analysis for the plant controller. b. Compute a 3-variance analysis for the plant manager. c Compute a 2-variance analysis for the corporate controller. d. Compute the flexible-budget variance for the manufacturing vice-president