The following data are available for the most recent year of operations for Slacker & Sons. The revenue portion of the sales activity variance is $165,000 F. Master budget based on actual sales of 158,000 units: Revenue Materials Labor Variable manufacturing overhead and administrative costs Fixed manufacturing overhead and administrative costs $3.300.000 858,000 633,000 133,000 380,000 Required: How many units were actually sold in the most recent period? (Do not round Intermediate calculations.) Actual sales 158,000 units b. Prepare a sales activity variance for the most recent year for Slacker & Sons. (Do not round intermediate calculations. 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.) SLACKER & SONS & Sales Activity Variance Flexible Budget Sales Activity Variance Master Budget F U U U $ 0 $ 0 Sales revenue Variable costs: Materials Direct labor Variable manufacturing and administrative Total variable costs Contribution margin Fixed costs: Manufacturing overhead and administrative Total fixed costs Operating profits U F $ 0 $ 0 $ 380,000 380,000 (380,000) $ $ 0