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>>>>By using PW equation approach, what will be the return equation in PW terms is

A company purchased an equipment for $50,000 on 1 January, 2021, and the maintenance cost for the equipment will be $1,000 per month, while there will be average revenues of $7,000 per month. The Equipment will scrapped at $15,000 after using it 3 years from the date of purchase. <<<<