It seems like ticket master with the fees at the end and then have people go well I'm already this far into the cart so I might as well check out, or electronics where the starting price is low then few upgrades and price is more than double the initial eye catching low base price.

It's all pricing tricks except in this one they shift the blame to customers and workers while upper management watches them fight. And tricked people into saying it's somehow impossible to actually charge a product to account for all the overhead because it's a services and acting like every other monetary based activity isn't a service too but doesn't have pricing problems.