Calculate the activity variances for March. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values.) FAB Corporation Activity Variances For the Month Ended March 31 Utilities Maintenance Supplies Indirect labor Depreciation Tota None Calculate the spending variances for March. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values.) FAB Corporation Spending Variances For the Month Ended March 31 Utilities Maintenance Supplies Indirect labor Depreciation Total