Please help me with this 2 questions. I did some work on it and extract the data out of it, I have the formula but need the steps and to show how I

Please help me with this 2 questions. I did some work on it and extract the data out of it, I have the formula but need the steps and to show how I put the data in the formula to get the result which I provided below as well. here the text are the questions.

Questions:

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 Profit when the equipment is disposed

-stnd

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