Backpack Inc. reported the following actual and budgeted results for 2021. Actual Budgeted Backpack production 200,000 190,000 Backpacks sold 150,000 160,000 Selling price $20 $18 Direct materials per backpack 1.5 yards @ $2.00 Direct labor per backpack 0.5 hr. @$14 Direct materials used in yards 290,000 Direct material costs $580,000 Direct manufacturing hours used 140,000 I" Direct labor costs $1,820,000 Fixed manufacturing overhead costs $900,000 $825,000 Required: (a) Calculate the direct materials price and efficiency variances, (b) Calculate the direct labor price and efficiency variances. (c) Fixed overhead flexible budget and production volume variances (d) Calculate the flexible budget variance for sales revenue