This document discusses investment decision rules and calculations for projects A and B. It provides the calculations to determine the payback period for Project B is closest to 2.4 years. It also shows the calculations for the internal rate of return (IRR) of Project A being closest to 21.6% and Project B being closest to 23.3%. Based on the IRR and net present value calculations shown, the document states you should accept Project A since its IRR is greater than 15%. The final question discusses an investment in an automated forklift system using the economic value added (EVA) rule and determines the project should not be accepted since the EVA is negative.