there was a question before it that asked for "The annual worth of alternative B (i=10% per year)" I hope that helps

Evaluation of Alternatives at i=10% per year A B First Cost (5) Annual O&M ($/year) Major Repair ($) 0 10,000 18,000 5,000 4,000 2,000 after 5 years of operation 40,000 2,000 5,000 after 10 years of operation 7,800 15 2,000 Annual revenues ($/year) life (years) Salvage ($) 7,200 5 2,000 7,500 10 2,000 The Modified (B/C) for alternative B, at i=10% per year, is: Choose 1.13 1.22 1.03 0.95 1.18