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Sheffield Corporation manulactures a single prodoct. The standard cost per unit of product is shown below. The predetermined manuf acturing overhead rate is $16 per direct labor hour ( $8.00+0.50) it was computed from a master manufacturing overhead budget baked an nermal production of 2.500 direct labor hours (5.000 units) for the menth The master budset showed total variable costs of $13,750 (\$5,50 per hour) and total fued ovethead conts of $26.250($10,50 per hour), Actual costs for October in producing 3,900 unlts were as follom. The purchating depariment burs the ouantities of raw materials that are expected to be used ia production each month. Raw materials inventorits, therefore, can be ienored. (b) Compute the total overhead variance. Total overhead variance $ eTextbook and Media