Required information [The following information apples to the questians displayed below] Preble Company manufactures one product. its variable manufocturing overhead is applied to production based on direct laber-hours and its standard cost card per unit is as follows: The planning budget for March was based on producing and selling 25,000 units. However, during March the company actually produced and sold 30,000 units and incurred the following costs: a. Purchased 160,000 pounds of caw materials at a cost of $7.50 per pound. All of this material was used in production. b. Direct iaborers worked 55,000 hours at a rate of $15.00 per hout, c. Total variable manufacturing overhead for the month was 5280,500 . Wat is the labor spending variance for March? findicate the effect of each varlance by selecting "f" for favorable, "U" for unfavorable, and "None" for no effect (i.e., ze nee.). tnput alt amounts as positive values.)