Osage, |nc., manufactures and sells lamps. The company produces only when it receives orders and, therefore, has no inventories. The following information is available for the current month: Actual (based on Master Budget actual orders (based on budgeted for 450,000 orders for 480,000 units) units) Sales revenue $4,485,000 $4,320,000 Less Variable costs Materials 1,536,000 1,536,000 Direct labor 218,000 288,000 Variable overhead 675,900 624,000 Variable marketing and administrative 395,500 408,000 Total variable costs $2,825,400 $2,856,000 Contribution margin $1,659,600 $1,464,000 Less Fixed costs Manufacturing overhead 653,100 625,000 Marketing 175,000 175,000 Administrative 145,500 122,500 Total fixed costs $ 973,600 $ 922,500 Operating profits $ 535.000 $ 541.500 Requhed: Prepare a sales activity variance analysis for Osage, Inc. (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.)