31. The manufacture of herbal health tonic is a competitive industry. The manufacturing facilities have an annual output of 100,000 gallons. Operating costs are $2 per gallon. A 100,000 gallon capacity plant costs $500,000 to build and have an indefinite life, with no salvage value. The cost of capital is 20% (assume no taxes). Your company has discovered a new process that lowers the operating cost per gallon to $1.00. Assuming that the competition will catch up in three years and the market demand is sufficiently high, what is the net present value of building a new plant with new technology? A. $500,000 B. $210,648 C. +$250,000 D. None of the above