a. A company is considering replacing an old piece of machinery, which cost $600,000 and has $350,000 of accumulated depreciation to date, with a new machine that has a purchase price of $545,000. The old machine could be sold for $231,000. The annual variable production costs associated with the old machine are estimated to be $61,000 per year for eight years. The annual variable production costs for the new machine are estimated to be $19,000 per year for eight years. Prepare a differential analysis dated September 13, to determine whether to continue with (Alternative 1) or replace (Alternative 2) the old machine. If an amount is zero, enter zero "0". Use a minus sign to indicate a loss. Differential Effect on Income (Alternative 2) Differential Analysis Continue with Old Machine (Alt. 1) or Replace Old Machine (Alt. 2) September 13 Continue with Old Machine (Alternative 1) Replace Old Machine (Alternative 2) Revenues: Proceeds from sale of old machine $ Costs: Purchase price Variable production costs (8 years) Income (Loss) Determine whether to continue with (Alternative 1) or replace (Alternative 2) the old machine. Machine Replacement Decision b. What is the sunk cost in this situation