title: Add two values ​in mysql
body: <p>I enter in the database the value with this format <code>1 000.00</code>.
  I want to add two values ​​of this format, for example <code>1 000.00 + 4 000.00</code> like this:</p>
  <pre><code>CAST(SUM(1 000.00 + 4 000.00) AS DECIMAL (15 , 2 )) AS Pago
  </code></pre>
  <p>the returned value is <code>5</code> and should be <code>5 000.00</code></p>