Reconsider Problem 30. Determine which insulation (if any) should be purchased based on an incremental present worth analysis.

Data from problem 30 

Parker County Community College (PCCC) is trying to determine whether to use no insulation or to use insulation that is either 1 inch thick or 2 inches thick on its steam pipes. The heat loss from the pipes without insulation is expected to cost \($1.50\) per year per foot of pipe. A 1-inch thick insulated covering will eliminate 89 percent of the loss and will cost \($0.40\) per foot. A 2-inch thick insulated covering will eliminate 92 percent of the loss and will cost \($0.85\) per foot. PCCC Physical Plant Services estimates that there are 250,000 feet of steam pipe on campus. The PCCC Accounting Office requires a 10 percent/year return to justify capital expenditures. The insulation has a life expectancy of 10 years. Determine which insulation (if any) should be purchased using a ranking present worth analysis.