A company is analyzing a pressing machine to acquire. The purchasing price of this machine is $300,000. This machine will be used towards pressing 1,000 products every 6 months, which each will be sold for $50. Its operating and maintenance cost will be $7000 in the first semi-annual and it increases by $500 every six months (semi-annual) after that till the end of its useful life, which year 7. The salvage value at the end of year 7 will be $20,000. If the interest rate is 7% per year, compounded quarterly, do you recommend the company to purchase this pressing machine? Provide your detailed calculations.