Problem #9: A portfolio has a value P(E, S), so that the value P is a function of E, the price of a Euro in Canadian dollars, and S, the level of the TSX stock index. Presently the portfolio is worth $451,000, while a Euro is $1.50 Canadian, and the index is S = 18,000. If the partial derivatives of P have values OP = 63,000, and -15, what approximately will the portfolio value be if the price of a Euro goes down by 0.05 and the stock index goes down by 563? =