title: eBay : what value should be set for ShippingCostPaidByOption for return policy API
body: <p>I'm working with ebay Trading API for listing the product but after I'm stucking in it where i need to set value for a option in <code>Return policy Type API</code>, I need to set <code>ShippingCostPaidByOption</code> with value either Paid by buyer or Paid by Seller?</p>
  
  <p>Similarly I need to set <code>RefundOption</code> value either <code>Money</code> or Money or item replace.</p>