Current Attempt in Progress Waterway Industries is contemplating the replacement of an old machine with a new one. The following information has been gathered: Old Machine $450000 New Machine $900000 135000 -0- Price Accumulated Depreciation Remaining useful life Useful life Annual operating costs 10 years -0- -0 10 years $360000 $270000 If the old machine is replaced, it can be sold for $36000. Which of the following amounts is a sunk cost? $315000 $360000 $270000 $900000