4. Pena Corporation allocates both variable and fixed overhead based on machine hours. The following variable and fixed overhead data pertain to Pena's current period results: Actual Production Machine-hours Variable overhead cost Fixed overhead cost Budget 100,000 units 10,000 hours 50,000 $ 25,000 110,000 units 9,800 hours $51,450 $26,000 a. Compute a three column variance analysis of Pena's variable manufacturing overhead for the results reported above. Include all appropriate variance descriptions Compute a three column variance analysis of Pena's fixed manufacturing overhead for the results reported above. Identify the under/over allocated fixed overhead amount and all appropriate variance descriptions. b