Question $12$

Calculate out the present value of the following bond contract:

Coupon payments of $$50,000$ at the end of each year for the next $15$ years with annual compounding

$$450,000$ principal payment at the end of the $15$ th year

The annual market rate of interest is $12\%$

Round to the nearest dollar.

the final total is $422,756,542.$ Where did that amount come from? Help me please