Calculate the cost per ton for a 150 ton per day incinerator that costs $25 million if it is assumed: (1) the incinerator operates at capacity; (2) the incinerator has a 25 year lifetime; and (3) the incinerator is financed over its lifetime at an interest rate of 5%.

What would be the cost per ton if the interest rate were 7%?

User charges based on some form of unit pricing (pay-asyou-throw) are now being used by some communities to recover the costs of solid waste collection and disposal services. What are the advantages and disadvantages of this approach?