A large refinery-petrochemical complex is to manufacture caustic soda, which will use feed water of 10,000 gallons

Question:

A large refinery-petrochemical complex is to manufacture caustic soda, which will use feed water of 10,000 gallons per day. Two types of feed water storage installation are being considered over the 40 years of their useful life.
• Option 1. Build a 20,000-gallon tank on a tower. The cost of installing the tank and tower is estimated to be $164,000. The is estimated to be negligible.
• Option 2. Place a tank of 20,000-gallon capacity on a hill, which is 150 yards away from the refinery. The cost of installing the tank on the hill, including the extra length of service lines, is estimated to be $120,000 with negligible . Because of the tank's location on the hill, an additional investment of $12,000 in pumping equipment is required. The pumping equipment is expected to have a service life of 20 years with a of $ 1,000 at the end of that time. The annual operating and maintenance cost (including any income tax effects) for the pumping operation is estimated at $1,000.
If the firm's is known to be 12%, which option is better on the basis of the present-worth criterion?
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