The State Library of South Australia has incurred the following costs in its Loans Department over the last 6 months of Financial Year 2020-2021. Month Number of Loans Total Cost Jan 4900 Feb 5300 Mar 6200 $ 76,200.00 $ 87,000.00 $ 90,000.00 $ 78,100.00 $ 80,700.00 $ 75,000.00 4800 Apr May 5050 Jun 3700 a) Estimate the monthly fixed cost and the variable cost per loan (up to 2 decimal places) using the high-low method. (2 x 2 = 4 marks) b) State the cost equation for State Library of South Australia. (1 mark) c) Estimate the cost for Dec if the forecasted loans is 4850. (1 mark) d) Cite the advantage(s) of using the High Low Method. (2.5 marks) e) Identify possible drawback(s) of using the High Low Method. (2.5 marks)