i have a question regarding finding the salvage value of an investment when calculating cash flow and npv of a project.

if I have the following, how would the salvage value be determined if it were 3 year MACRs and how would it be determined if it was straight line. and how would it be determined if 3 years MACRA but was to sold for salvage year 4.

initial fixed asset investment 3,000,000

tax rate 30 %

salvage value 260,000

please show answer with calculations, so i can see how it is determined. i dont know if depreciation (book value) gets incorporated or not and if it does, then what value gets incorporated.