7.26 The two alternatives shown are under consideration for improving security at a county jail in Travis County, New York. Determine which one, if either, should be selected based on a B/C analysis, an interest rate of 7% per year, and a 10-year study period. Table Summary: Table divided into three columns compares two options for upgrading security in jail at the interest rate of 7%. Column 1 represents the factors. Columns 2 to 3 are marked as: extra cameras (EC) and new sensors (NS). Extra Cameras (EC) New Sensors (NS) First cost, $ 38,000 87,000 Annual M&O, $ per year 49,000 84,000 Benefits, $ per year 110,000 87,000 Disbenefits, $ per year 16,000 — 7.