The estimated capital investment and the annual expenses for three alternative designs of a diesel powered air compressor are shown, as well as the estimated market value for each design at the end of the common 5 year useful life. Each of the design provides the same level of service. Given a MARR of 8% per year, determine the preferred alternative using the Incremental Rate of Return (IRR) method. You will receive NO credit if you do not use the IRR method in this question.

	D1	D2	D3
Initial Cost	-100,000	-152,200	-149,600
Annual Expenses	-29,000	-12,000	-17,900
Useful Life	5	5	5
Salvage Value	10,000	25,600	14,000