Exercise 16-41 (Algo) Variable Cost Variances (LO 16-5). The standard direct material cost per unit for Willis Group was $156 ( =$39 per gallon 4 gallons per unit). During the period, actual direct materials costs amounted to $2,075,760, materials used totaled 55,480 gallons, and 13,280 units were produced. Required: Compute the direct materials price and efficiency variances for the period. Note: 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