You are given the following data for DDD (Pty) Ltd from January to July. Month Activity. Maintenance January. 5,600. P7, 900 Feb. 7,100. P8, 500 March. 5,000. P7,400 April. 6,500. P8, 200 May. 7,300. P9, 100 June. 8,000. P9, 800 July. 6,200. P7, 800 a) Calculate the fixed cost element using the high - low method. b) Calculate the cost of producing 10,000 units