Bob owns a warehouse that is used in business while rebecca owns land. bob exchanges the warehouse for the​ land, which will be held for investment. the fmv of the warehouse is​ $440,000 (basis​ $240,000), but the warehouse is subject to a mortgage of​ $80,000, which is assumed by rebecca. bob receives​ $40,000 cash and the​ land, which has a fmv of​ $320,000. bob realizes a gain​ (loss) on the exchange of