title: How can i take a cut/commission in paypal?
body: <p>how can i take a cut/commission in paypal after user has paid amount and before receiver has got amount.</p>
  
  <p>In my application I allow sellers to give some service to customers. When a customer pays $100 to seller then I need to cut 12.5% as commission.</p>
  
  <p>How can I do that in Paypal. My Application is in rails.</p>