What is the total consolidated net sales in 2017 and 2018
{"Net sales of continuing operations -- Consolidated net sales": {"2019": 946.9, "2018": 896.9, "2017": 791.8, "2019 vs 2018": 5.6, "2018 vs 2017": 13.3}, "Net sales of continuing operations -- Consolidated gross profits": {"2019": 325.7, "2018": 307.7, "2017": 273.2, "2019 vs 2018": 5.8, "2018 vs 2017": 12.6}, "Net sales of continuing operations -- Consolidated gross margin": {"2019": 34.4, "2018": 34.3, "2017": 34.5, "2019 vs 2018": 0.1, "2018 vs 2017": -0.2}, "Net sales of continuing operations -- Consolidated SD&A costs **": {"2019": 260.4, "2018": 245.2, "2017": 227.2, "2019 vs 2018": 6.2, "2018 vs 2017": 7.9}, "Net sales of continuing operations -- Consolidated SD&A costs ** as % of sales": {"2019": 27.5, "2018": 27.3, "2017": 28.7, "2019 vs 2018": 0.2, "2018 vs 2017": -1.4}, "Net sales of continuing operations -- Consolidated operating income": {"2019": 66.1, "2018": 61.7, "2017": 45.7, "2019 vs 2018": 7.1, "2018 vs 2017": 35.0}, "Net sales of continuing operations -- Consolidated operating margin from continuing operations": {"2019": 7.0, "2018": 6.9, "2017": 5.8, "2019 vs 2018": 0.1, "2018 vs 2017": 1.1}, "Net sales of continuing operations -- Effective income tax rate": {"2019": 24.4, "2018": 21.3, "2017": -44.0, "2019 vs 2018": 3.1, "2018 vs 2017": 65.3}, "Net sales of continuing operations -- Net income from continuing operations": {"2019": 50.0, "2018": 49.5, "2017": 65.5, "2019 vs 2018": 1.0, "2018 vs 2017": -24.4}, "Net sales of continuing operations -- Net margin from continuing operations": {"2019": 5.3, "2018": 5.5, "2017": 8.3, "2019 vs 2018": -0.2, "2018 vs 2017": -2.8}, "Net sales of continuing operations -- Income (loss) from discontinued operations, net of tax $": {"2019": -1.5, "2018": 175.2, "2017": -25.1, "2019 vs 2018": -100.9, "2018 vs 2017": 798.0}}
total_sales_2017 = df["Net sales of continuing operations -- Consolidated net sales"]["2017"]
total_sales_2018 = df["Net sales of continuing operations -- Consolidated net sales"]["2018"]
answer = total_sales_2017 + total_sales_2018