It is an elegant feature of the Cost Calculator Pro that a well-spread PayPal payment gateway can be used. Enable the radio button to make PayPal functions available from Calculator Settings > PayPal.
In the Paypal option fields, you should insert the following fields:
PayPal email - an email that can be created on PayPal official website
Currency Symbol - a currency that you want to operate with
3. Live or Sandbox -a testing environment that simulates the live PayPal production environment.
Click "Save" to save your settings.