cost accounting

Mandeville Ltd planned to produce 200,000 units of X, using 40,000 machine hours at an expected fixed overhead cost of $340,000. Fixed overheads are absorbed on a machine hour basis. Calculate the amount of fixed cost over or under absorbed if: (a) The company produced 210,000 units using 38,000 machine hours and actual fixed overhead cost incurred was $350,000. (b) The company incurred the same fixed cost as planned but produce the 200,000 units using 40,500 hours. (c) The company produced 190,000 units at a fixed cost of $290,000, using 30,000 hours