Take advantage of cheap Ecommerce website hosting.
The integration of 1&1 E-Shop which is a part of 1&1 hosting is done by direct insertion of the sale tracking code to a special section designed for affiliate tracking code.
You can track total cost, order ID, customer email (for Lifetime Commissions) and currency.
Navigate to eBusiness> 1&1 E-Shop> Settings> Cart settings> Texts> Affiliate-Tracking-Code section and
If you want to track a currency as well, use placeholder #CurrencyCode
Save your changes and you are done. The site just has been integrated.