Problem 11.012 Economic Service Life From the data shown, determine the ESL of the asset. (Note: Values in the table are AW values, not individual year-end values.) Years Retained AW of First Cost, $ 156,000 140,000 154,000 -168,000 -162,000 AW of Operating Cost, $ 40,000 50,000 39,000 43,000 45,000 AW of Salvage Value, $ 99,000 38,095 18,127 6464 3276 2 3 4 The ESL of the asset isyear(s)