Payment is made through Paypal.
To do this you must have an account on the system of Paypal.
If you do not have a PayPal account you can create one from here.
After making a payment via PayPal, you will receive a message e-mail address that you registered in PayPal.
Log back in to http://economy-time.com, go to product which you have purchased, and download it from the button "Download".