The following data are available for the most recent year of operations for Slacker& Sons. The revenue portion of the sales activity variance is $204,000 F Master budget based on actual sales of 159,000 units Revenue Materials Labor Variable manufacturing overhead and administrative costs Fixed manufacturing overhead and administrative costs $3.400,000 859.000 634.000 134,000 390,000 Required a. How many units were actually sold in the most recent period? (Do not round intermediate calculations.) 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 Sales revenue Variable costs Direct labor Total variable costs Contribution margin Fixed costs: Total fixed costs Operating profits