It has been decided that whole body scanning technology will be used for airport security purposes..

It has been decided that whole body scanning technology will be used for airport security purposes. Two types of devices are being considered at a certain airport (only one will be selected): back scatter (B) and millimeter wave (W). The selected scanning equipment is to be used for six years. The economic decision criterion at this airport is to meet or exceed a 15% annual return on its investment. Based on the data found in Table P6-48, which scanner should be selected? Use the PW method of analysis. Which rule, Section 6.2.2, did you use in your analysis?