6.Go to settings of your WP Simple Paypal shopping cart

7.Enter your Paypal email address,shopping cart title,change currency from the drop down menu,add base shipping cost(optional),return URL etc.

8.Replace "test product" and "29.95" with the actual product name and price

[wp_cart_button name ="Dress" price="40.00"]

9.Now copy the above short code to a post or page

10.Now save draft,publish or preview