title: Stripping '$'-sign from sales list
body: <p>Why am I unable to strip '$' in the first method of code however I am able to strip in the second method?</p>
  <p><strong>Method 1</strong></p>
  <pre><code>sales = ['$1.21', '$7.29', '$12.52', '$5.13', '$20.39', '$30.82', '$1.85', '$17.98', '$17.41', '$28.59']
  
  for element in sales:
   element.strip('$')
  
   print(element)
  </code></pre>
  <p><strong>Method 2</strong></p>
  <pre><code>sales = ['$1.21', '$7.29', '$12.52', '$5.13', '$20.39', '$30.82', '$1.85', '$17.98', '$17.41', '$28.59']
  
  for element in sales:
  
   print(element.strip('$'))
  </code></pre>