The master budget at Monroe Manufacturing last period called for sales of 42,000 units at $42 each. The costs were estimated to be $26 variable per unit and $524,000 fixed. During the period, actual production and actual sales were 45,000 units. The selling price was $41 per unit. Variable costs were $28 per unit. Actual fixed costs were $515,000. Required: Prepare a sales activity variance analysis. Note: Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option