Project X, ARR = ($88,500 − $50,000) / $500,000 = 0.077 or 7.7%
Project Y, ARR = ($34,320 − $25,000) / $100,000 = 0.0932 or 9.32%
Project Y, NPV = ($34,320 × 3.312) − $100,000 = $13,668
Project X, Discount factor = $500,000 / $88,500 = 5.650
corresponding to IRR of 12%
Project Y, Discount factor = $100,000 / $34,320 = 2.914
corresponding to IRR of 14%
dollar amount over the life of the project.