please answer the questions and show steps and explanations for them.

8-39. FLEXIBLE BUDGETS, 4-VARIANCE ANALYSIS. (CMA, adapted) Grant Manufacturing uses standard costing. It allocates manufacturing overhead (both variable and fixed) to products on the basis of standard direct manufacturing labor-hours (DMLH). Grant develops its manufacturing overhead rate from the current annual budget. The manufacturing overhead budget for 2020 is based on budgeted output of 576,000 units, requiring 2,304,000 DMLH. The company is able to schedule production uniformly throughout the year. A total of 46,000 output units requiring 193,200DMLH was produced during August 2020. Manufacturing overhead (MOH) costs incurred for August amounted to $329,100. The actual costs, compared with the annual budget and 1/12 of the annual budget, are as follows