Osage, Inc., 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: Required: 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.)