Required Information [The following information applles to the questions displayed below.] Preble Company manufactures one product. Its varlable 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 30,000 units in March. However, during March the company actually produced and sold 34,000 units and incurred the following costs: a. Purchased 175,000kg of raw materlals at a cost of $6.80 per kg. All of this material was used in production. b. Direct labour: 71,000 hours at a rate of $17 per hour. c. Total variable manufacturing overhead for the month was $340,090. 4. If Preble had purchased 186,000kg of materials at $6.80 per kg and used 175,000kg in production, what would be the materlals quantity varlance for March? (Indlcate the effect of each varlance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (I.e., zero varlance.). Do not round Intermedlate calculations.)