Requirement #4: Based on the "Operational Results" information presented for January, February, and March, complete the following: 1. Identify the variable, fixed and mixed costs 2. Develop the cost formula for each of the mixed costs using the high-low method? 3. Calculate the total cost for each mixed cost at an activity level of 3,600? 4. Prepare a contribution margin format income statement for the month of March (3,000 units)