Approximately 76 million people have purchased from Amazon.com.Chances are, many of you click this “Add to Shopping Cart” button several times throughout the year.

So, why does it always stump audiences of online marketers when I ask them where in the checkout process Amazon has us select a quantity for the item(s) we’re adding-to-cart?

Before you scroll down for the answer, let me give you some popular Add-to-Cart methods to choose from:

#1