7.1.6 Under the current market conditions Bond 1 has a price (per 100 of face amount) of 88.35 and a Macaulay duration of 12.7, and Bond 2 has a price (per 100 of face amount) of 130.49 and Macaulay duration of 14.6. A portfolio is created with a combination of face amount F of Bond 1 and face amount of Bond 2. The combined face amount of the portfolio is F + F = 100, and the Macaulay duration of the portfolio is 13.5. Find the portfolio value