ZyCo uses the straight-line method. Assets purchased between the 1^st and 15^th of the month are depreciated for the entire month; assets purchased after the 15^th of the month are treated as though they were acquired the following month. On May 2, 20X1, ZyCo purchases furniture for $35,000 that it expects to last for 10 years; ZyCo expects the furniture to have a residual value of $3,000. What is the book value at the end of 20X3?