During May, Joliet Fabrics Corporation manufactured 560 units of a special multilayer fabric with the trade name Stylex. The following information from the Stylex production department also pertains to May. Direct material purchased: 18,600 yards at $1.44 per yard Direct material used: 10,100 yards at $1.44 per yard Direct labor: 2,700 hours at $9.21 per hour $ 26,784 14,544 24,867 The standard prime costs for one unit of Stylex are as follows: Direct material: 20 yards at $1.41 per yard Direct labor: 4 hours at $9.00 per hour Total standard prime cost per unit of output $28.20 36.00 $64.20 Required: Compute the following variances for the month of May. (Indicate the effect of each variance by selecting "Favorable" or "Unfavorable". Select "None" and enter "O" for no effect (i.e., zero variance).