A department of Alpha Co. incurred the following costs for the month of September. Variable costs, and the variable portion of mixed costs, are a function of the number of units of activity Activity level in units Variable costs Fixed costs Mixed costs Total costs 3,500 $ 6.825 29,000 21,650 $57,475 During October the activity level was 9,000 units, and the total costs incurred were $69,500 Required a. Calculate the variable costs, fixed costs, and mixed costs incurred during October October Variable cost Fixed cost Mixed cost b. Use the high-low method to calculate the cost formula for mixed cost. (Do not round intermediate calculations and round your answers to 2 decimal places.) formula per unit References Worksheet Olcuity EasyLean cts Leaming Objective 12-06 Use the method to determine the cos