What was the change in cost of furniture and fixtures between 2018 and 2019?
{"Computer and office equipment": {"Useful Lives": 3, "2019": 143942, "2018": 129359}, "Leasehold improvements lease": {"Useful Lives": "Lesser of useful life of improvement or remaining life of lease", "2019": 33346, "2018": 32096}, "Furniture and fixtures": {"Useful Lives": 7, "2019": 12980, "2018": 12500}, "Building and improvements": {"Useful Lives": 7, "2019": 14553, "2018": 14381}, "Land": {"Useful Lives": "Non-depreciable", "2019": 1785, "2018": 1785}, "Property and equipment, gross": {"Useful Lives": "", "2019": 206606, "2018": 190121}, "Less: accumulated depreciation": {"Useful Lives": "", "2019": -136226, "2018": -117392}, "Property and equipment, net": {"Useful Lives": "", "2019": 70380, "2018": 72729}}
furniture_and_fixtures_2019 = df["Furniture and fixtures"]["2019"]
furniture_and_fixtures_2018 = df["Furniture and fixtures"]["2018"]
answer = furniture_and_fixtures_2019 - furniture_and_fixtures_2018