Sure, if you only bought a single item once, but when you have a shopping cart full and a repeated purchases over the year, $10 here and $10 there can easily ad

Sure, if you only bought a single item once, but when you have a shopping cart full and a repeated purchases over the year, $10 here and $10 there can easily add up over the year. The article is clearly just highlighting the wider problem using a single product as an example.