The following data are available for the most recent year of operations for Slacker & Sons. The revenue portion of the sales activity variance is $287,000 F. Master budget based on actual sales of 166,000 units: $4,100,000 Materials 866,000 Labor 641,000 Variable manufacturing overhead and administrative 141,000 costs Fixed manufacturing overhead and administrative 460,000 costs Required: a. How many units were actually sold in the most recent period? b. Prepare a sales activity variance for the most recent year for Slacker & Sons