A company is considering replacing an old piece of machinery, which cost $168,000 and has $88,000 of accumulated depreciation to date, with a new machine that has a purchase price of $107,900. The old machine could be sold for $90,100. The annual variable production costs associated with the old machine are estimated to be $11,200 p year for 8 years. The annual variable production costs for the new machine are estimated to be $8,000 per year for 8 years. a. Prepare a differential analysis dated April 29 to determine whether to Continue with Old Machine (Alternative 1) or Replace Old Machine (Aiternative 2). If an amount is zero, enter " 0 ". For those boxes in which you must enter subtracted or negative numbers use a minus sign. Determine whether to continue with (Alternative 1) or replace (Alternative 2) the old machine. b. What is the sunk cost in this situation