title: Sum of two variables in RobotFramework
body: <p>I have two variables:</p>
  
  <pre><code>${calculatedTotalPrice} = 42,42
  
  ${productPrice1} = 43,15
  </code></pre>
  
  <p>I executed</p>
  
  <pre><code>${calculatedTotalPrice}     Evaluate ${calculatedTotalPrice}+${productPrice1}
  </code></pre>
  
  <p>I got</p>
  
  <pre><code>42,85,15
  </code></pre>
  
  <p>How can I resolve it?</p>