Please help with the below problem

PROBLEM 11-?. Comprehensive Variance Problem [LO 1 , 2] Dante's Protein Powder produces a dietary supplement. The standard cost of producing one unit is: Material (1.25 pounds x $2.50) $ 3.13 Labor (1.2 hours )4 $10) 12.00 Overhead l 1.60 Total $26.73 Standard variable overhead is $8.00 per unit, and xed annual overhead is $90,000. At the start of 2018, expected production was 25.000 units. During 2018, 30.000 units were produced. The following information, related to actual costs incurred in 2018, is available: 1 . Purchased 40,000 pounds of material for $85,000. 2. Used 38,750 pounds of material. 3. Worked 35,300 labor hours costing $375,000. 4. Actual overhead incurred was $327,000. REQUIRED a. Show the calculation of the standard overhead rate per unit. b. Calculate all material, labor, and overhead variances. c. Prepare a variance summary, and briey comment on variances that should be investigated