4. 5.26 Compare two alternatives for a physical security system surrounding a power distribution substation using annual worth analysis and a MARR of 10% per year.

Table Summary: A table divided into 3 columns summarizes cost estimate of alternatives for a physical security system.

The column headers are marked from left to right as: System; Condi; and Torro.

System Condi Torro First cost, $ −25,000 −130,000 M&O cost, $ per year −9,000 −2,500 Salvage value, $ 3,000 100,000 Life, years 3 ∞