The standard cost sheet for Chambers Company, which manufactures one product, follows: Direct materials, 40 yards at $2.00 per yard $ 80 Direct labor, 5 hours at $20 per hour 100 Factory overhead applied at 80% of direct labor 80 (variable costs = $60; fixed costs = $20) Variable selling and administrative 64 Fixed selling and administrative 40 Total unit costs $ 364 Standards have been computed based on a master budget activity level of 28,800 direct labor-hours per month. Actual activity for the past month was as follows: Materials used 228,000 yards at $2.05 per yard Direct labor 25,200 hours at $20.40 per hour Total factory overhead $ 444,000 Production 5,000 units Required: Compute variance analyses for the variable and fixed costs. Materials are purchased as they are used. (Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.)