Ziegler Inci has decided to use the high-low method to estimate the total cost and the fixed and variable cost components of the total cost. The data for various levels of production are as follows: This information has been collected in the Microsoft Excel Oniline file. Open the spreadsheet, perform the required analysis, and input your answers in the questions below. Open spreadsheet a. Determine the variable cost per unit and the total fixed cost, Round your answer for variable cost to the nearest cent. Round your answer for total fixed costs to the nearest dollar. Variable cost: Total fixed cost: b. Dased on part (o), estimate the total cost for 74,000 units of production. Round your answer to the nearest dolloe. Total cost for 74,000 units