title: APR calculation formula
body: <p>I posted this in banking stackexchange too, but since it is more of an algorithm, I figured someone here would be able to answer my question</p>
  
  <p>I am using the formula listed on this site:</p>
  
  <p><a href="http://www.fdic.gov/regulations/laws/rules/6500-1950.html#fdic6500appendixjtopart226" rel="nofollow">http://www.fdic.gov/regulations/laws/rules/6500-1950.html#fdic6500appendixjtopart226</a></p>
  
  <p>(go to appendix J, if it doesn't auto scroll).</p>
  
  <p>In step 9, they are trying to find the value of A = (33.61 * )/ (i+1)</p>
  
  <p>and that is calculated as 1 + 1/(i+1) + 1/(i+1)^2 +......1/(i+1)^n</p>
  
  <p>Taking n = 36, I find = 28.83,</p>
  
  <p>and I am getting the value of A = 33.61 * 28.83 / 1.0104 = 941.3</p>
  
  <p>But, the link somehow arrives at the number of 1004.674391</p>
  
  <p>Can anyone explain how they arrive at this number and what A' and A'' mean?</p>
  
  <p>I am trying to code for this in C++, but before I do, I need to get the math straight on pencil.</p>