What is the total number of weighted average shares outstanding used in computing diluted EPS in 2017 and 2018?
{"Net income": {"2017": 125785.0, "2018": 4910.0, "2019": 271813.0}, "Computation of Basic EPS: -- Weighted Average Shares Outstanding used in Computing Basic EPS": {"2017": 167506.0, "2018": 168262.0, "2019": 168713.0}, "Computation of Basic EPS: -- Basic earnings per share": {"2017": 0.75, "2018": 0.03, "2019": 1.61}, "Computation of Diluted EPS: -- Weighted Average Shares Outstanding used in Computing Basic EPS": {"2017": 167506.0, "2018": 168262.0, "2019": 168713.0}, "Computation of Diluted EPS: -- Effect of stock options": {"2017": 311.0, "2018": 663.0, "2019": 609.0}, "Computation of Diluted EPS: -- Weighted Average Shares Outstanding used in Computing Diluted EPS (1)": {"2017": 167837.0, "2018": 168925.0, "2019": 169322.0}, "Computation of Diluted EPS: -- Diluted earnings per share": {"2017": 0.75, "2018": 0.03, "2019": 1.61}}
weighted_avg_shares_2017 = df["Computation of Diluted EPS: -- Weighted Average Shares Outstanding used in Computing Diluted EPS (1)"]["2017"]
weighted_avg_shares_2018 = df["Computation of Diluted EPS: -- Weighted Average Shares Outstanding used in Computing Diluted EPS (1)"]["2018"]
answer = weighted_avg_shares_2017 + weighted_avg_shares_2018