The master budget at Monroe Manufacturing last period called for sales of 43,600 units at $58 each. The costs were estimated to be $42 variable per unit and $540,000 fixed. During the period, actual production and actual sales were 46,600 units. The selling price was $57 per unit. Variable costs were $44 per unit. Actual fixed costs were $531,000. Required: Prepare a sales activity variance analysis. Note: Indicate the effect of each varlance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select elther option. Sales revenue Less: Variable costs Contribution margin Less: Fixed costs Monroe Manufacturing Sales Activity Variance Flexible Budget Sales Activity Variance Master Budget U S 0 S 0 Operating profits S S 0