What is the financial equity in 2018?
{"Financial assets: -- Cash and cash equivalents": {"2018": 285907, "2019": 497874}, "Financial assets: -- Accounts receivable": {"2018": 173450, "2019": 199535}, "Financial liabilities: -- Accounts payable": {"2018": 80640, "2019": 119712}}
financial_equity_2018 = df["Financial assets: -- Cash and cash equivalents"]["2018"] + df["Financial assets: -- Accounts receivable"]["2018"] - df["Financial liabilities: -- Accounts payable"]["2018"]
answer = financial_equity_2018