The standards for one case of Springfever Tonic are as follows: During the week ended March 13, the following activity took ploces 22.500 pound of raw materials were purchased for inventory at a cost of $5.25 per pound. 2.800 cases of finished product were produced. 18,500 pound of raw materials were used. 14,400 direct labot hours were worked at a total cost of $187,200. $89.280 of actual varlable overhead costs were incurred. Required: Calculate each of the following variances Note: Do not round intermediote calculations. Indicate the effect of each variance by selecting "F" for favorable. "U" for unfovoroble, and "None" for no effect (l.e., zero variance)