Call first and see if they were turned in. They almost always are. If not they'll either just let you grab the item you left if its cheap or check the cameras to see where it got lost. Just make sure you have your receipt.
They really should tell their cashiers to better check that darn bag carousel so that noone leaves a bag. Ive left a bag like that twice. You barely got all your bags loaded and the cashier is already putting the next persons stuff in a bag. You really feel rushed. Give them a call to start the communication. Theyll tell you to bring your receipt to customer service and you may have to go back to electronics to get them and then take them back to customer service. I hope it works for you.
I would suggest looking at your receipt. If you paid for it, go back and tell them you did not get the items you paid for. They should give you the stuff that you did not get. If not, that would be terrible customer service.
Hope I helped you. :)
You should call and tell them that you left a bag at the checkout and tell them what it contained. If they found it, you'll be good to go. This happens more often than you would think.