Pleasant Pools Inc. has the following shipping costs for the last 6 months. Month Kilometers Cost April 20,000 $ 11,000 May 38,000 $ 15,000 June 42,000 $ 20,000 July 40,000 $ 17,000 August 45,000 $ 21,000 September 32,000 $ 18,000 Required: 1. Using the High Low Method, develop a cost equation for the shipping costs for Pleasant Pools Inc. (6 Marks) 2. Describe what a mixed cost is and explain why this problem demonstrates mixed costs. (1 Mark)