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Belle Auto Detailing reported the following results for the past week: Actual number of cars detailed 160 Actual direct labor hours used 320 Actual total direct labor cost $6,500 200 Budgeted number of cars to be detailed Standard direct labor cost per hour Standard direct labor per car $5.44 1.5 What is Belle's direct labor efficiency variance? O A. $1,625 favorable O B. $435 favorable O c. $435 unfavorable OD. $1,625 unfavorable