Required: Calculate the company's revenue and spending variances for August (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (.e., zero variance). Input all amounts as positive values.) Quilcone Oysteria Revenue and Spending Variances For the Month Ended August 31 Revenue Expenses Packing supplies Oyster bed maintenance Wages and salaties Shipping Utilities Other Total expense Net operating income