title: Convert & store String into currency values
body: <p>I have a String and i need to convert it into Currency format in RUBY and
  verify whether it matches to the expected.</p>
  
  <pre><code>String = "$6,178.50 USD / 22,693.01 AED"
  </code></pre>
  
  <p>I want to split it into 2 different variables like</p>
  
  <pre><code>usa_price = $6,178.50
  
  aed_price = 22,693.01
  </code></pre>
  
  <p><code>expected_output= $6,178.50 * 3.67 = 22,693.01</code> (should match value in AED)</p>
  
  <p>I tried doing gsub/scan and im confused now, what's the best way to
  achieve this in Ruby!!!</p>