Required information [The following information applies to the questions displayed below.] Preble Company manufactures one product. Its variable manufacturing overhead is applied to production based on direct labour-hours, and its standard costs per unit are as follows: The company planned to produce and sell 21,000 units in March. However, during March the company actually produced and sold 26,000 units and incurred the following costs: a. Purchased 160.000kg of raw materials at a cost of $6.50 per kg. All of this material was used in production. b. Direct labour: 70,000 hours at a rate of $16 per hour. c. Total variabie manufacturing overhead for the month was $655,200. 2. What is the materials quantity variance 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.)]