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Swifty Corporation manufactures a singlie product. The standard cost per unit of product is shown belaw The predetermined manufacturing overhead rate is 510 per direct labor hour $5.00+0.501. it was computid from a master manufacturing overhead budget based on normal production of 2,500 direct labor hours 15,000 unita) for the month. The master budget showed total varlable costs of 513,750 ( 55.50 per hour) and total fixod overhead costs of 511.250(5450 per hour). Actual costs for October in producine 3,000 units were as follows. The purchasing department buys the quantities of rew materials that are expected to be used in production each month Raw materials inventories, therefore, can be ignored. (a) Compute all of the materials and labor variances. (b) Compute the fotal overhead variance Totaloverhead variance is