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Arrasmith Corporation uses customers served as its measure of activity. During February, the compary budgoted for 36,900 customers, but octually served 27,100 customers. The company uses the following revenue and cost formulas in its budgeting, where a is the number of customers served: The company reported the following actual results for February: Required: Prepare the company's flexible budget performance report for February, Label each varlance as favorable (F) or unfavorable (U). (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values.)