You are ignorant... asking to remove your complaint is unnecessary, you've already displayed your ignorance.
As a matter of fact,
if you havn't noticed, Best Buy is a very busy store. No doubt, she was just trying to scan everything at once. I'm sure you were a cashier at least once as a teen... when crowds come in, you just want everything scanned, paid for, and on to the next customer. Obviously she didn't MEAN to scan your ink box, because she took it off once you mentioned it. What was she going to gain from your measley twenty four dollars? It's not like she was going to get a huge raise for it... Maybe instead of standing there like an idiot, you should have said "This isn't the store's products" when you walked up to the register. You're an adult- don't expect cashiers to babysitt you when youre leaving the store. You're in control of what you want to purchase, so don't leave it up to everyone else to hold your hand and take a guess at which prodcuts are theirs and which you've brought in. It's common sense.