<iframe width="580" height="385" src="https://www.youtube.com/embed/ls0_3b0eiSY?rel=0&modestbranding=1" frameborder="0" allowfullscreen></iframe> <br>OnlineCalculator.org is used to calculate the price of borrowing cash for a mortgage. Essentials Math 40S <br><a href="https://www.youtube.com/watch?v=ls0_3b0eiSY">source</a>