RH makes and sells one product, which has the following standard production cost. 18 28 Direct labour Direct materials Production overhead 3 hours at $6 per hour 4 kilograms at $7 per kg Variable Fixed 20 69 Standard production cost per unit Normal output is 16,000 units per annum. Variable selling, distribution and administration costs are 20 per cent of sales value. Fixed costs are $180,000 per annum. There are no units in finished goods inventory at 1 October 20X2. The fixed overhead expenditure is spread evenly throughout the year. The selling price per unit is $140. Production and sales budgets are as follows. Six months ending 31 March 20X3 8,500 7,000 Six months ending 30 September 20X3 7,000 8,000 Production Sales Required Prepare profit statements for each of the six-monthly periods, using the following methods of costing