Patty Leave owned an apartment house for ten years. Depreciation was taken on a straight-line basis. When Patty's adjusted basis for this property was $200,000, she traded it for an office building having a fair market value of $600,000. The apartment house has 100 dwelling units, while the office building has 40 units rented to business enterprises. The properties are not located in the same city. What is Patty's reportable gain on this exchange