An of refinery finds that it is necessary to treat the waste liquids from a new process before discharging them into a stream. The treatment will ost $30,000 the first year, but process improvements will allow the costs to decline by $3,000 each year. As an alternative, an outside company will process the wastes for the foxed price of $15,000/year throughout the 15 year period, payable at the beginning of each year. Either way, there is no need to treat the wastes after 15 years. Use the annual worth method to determine how the wastes should be processed. The company's MARR is 12% Click the icon to view the interest and annuity table for discarole compounding when the MARR is 12% per year