Assume an investor buys a newly issued coupon rate of 5 percent, semi-annual 18 year bond at par. He sells it two years later, when market interest rates change to 6 percent. How much is the investor's capital gain or loss? (please use or round to 2 decimal places, for example, if your answer is -$78.801, which indicates loss, enter -78.80; if your answer is $100, which indicate gain, enter 100.00)