title: SUM Function Does Not Add Correctly
body: <p>I have a table from which I calculate the sum of values in a particular column. The table is:</p>
  
  <pre><code>PayTable
  
  Amount       GRPS        
  65,025.00    355
  -2,500.00    355
  7,014.40     355
  725.62       355
  241.67       355
  1,209.57     355
  241.87       355
  241.87       355
  </code></pre>
  
  <p>The query is:</p>
  
  <pre><code>SELECT   GRPS,SUM(Amount) AS AMT into AmtTab FROM PayTable GROUP BY  GRPS
  </code></pre>
  
  <p>This should give me a sum of 72200, however it returns 72199.999999999985 instead. However, it only does this for the group 355, for other groups, the calculation is correct</p>