In a replacement analysis for a small Silicon Valley start-up data server, the following data are known about the challenger: the initial investment is $22,000; there is no annual maintenance cost for the first three years, however, it will be $3,000 in each of years four and five, and then $4,000 in the sixth year and increasing by $1,000 each year until year 10. The salvage value is always $0, and MARR is 8% per year. What is the minimum EUAC of this challenger