Padang Corporation builds and maintains public road across the country. They have an outstanding issue of RM$1000$ par value bonds with an $9\%$ coupon interest rate per annum. The issue pays interest semi$-$annually and has $10$ years remaining to its maturity date. If bonds of similar risk are currently earning a $12\%$ rate of return annually, how much should Padang Corporations bond sell for today?

Please provide the answer with clear step & formula