11.31 Randall-Rico Consultants, 5 years ago, purchased for $45,000 a microwave signal graphical plotter for corrosion detection in concrete structures. It is expected to have the market values and annual

operating costs shown for its remaining useful life of up to 3 years. It could be traded now at an appraised market value of$8000. A replacement plotter with new Internet-based,digital technology costs $125,000, has an estimated salvage value of 8% of the purchase price after its 5-year life, and an AOC of 20% of its purchase price. At an interest rate of 15% per year,determine how many more years Randall-Rico should retain the present plotter. (Problem 11.45 continues the analysis using a spreadsheet.)