Fast Call Ltd, a call centre company, has the following cost data for the past year. Month Number Overtime of Calls Wages ($) July 11 000 7 400 August 9 000 6 900 September 5 000 6 500 October 9 000 6 600 November 8 000 6 800 December 11 000 7 450 January 12 500 7 890 February 8 000 6 800 March 1 000 6 050 April 7 000 6 100 May 5 000 6 200 June 10 000 7 300 Required: i) Using the high-low method, express the companys overtime wages as an equation where x represents the number of calls. (3 marks) ii) Predict the overtime wages if 12,000 calls are answered. (1 mark)

b) Fast Call Ltd, a call centre company, has the following cost data for the past year. Required: i) Using the high-low method, express the company's overtime wages as an equation where x represents the number of calls. ( 3 marks) ii) Predict the overtime wages if 12,000 calls are answered. (1 mark)