TrueNorth Light Bulb Company manufactures light bulbs. The standard direct materials quantity required to produce one LED light bulb is five pounds at a cost of $ 1 per pound. During November, 6 comma 400 LED light bulbs were produced using 25 comma 280 pounds of direct materials that cost $ 31 comma 600. What are the direct materials cost and efficiency variances? Indicate the amount and if the variances are favorable (F) or unfavorable (U). (Round intermediary and final calculations to the nearest whole dollar.) Question content area bottom Part 1 Amount Label Cost Variance = Efficiency Variance =