I am selling cans at 75 cents cost is about 27 to 30 cents each. I buy at Walmart they are cheaper than Sam's also Walmart will price match any other store in the area. This week coke & Pepsi are sell for $3.00 12/pack
I typically do the same thing. I watch their prices along with other local grocery stores. Many times through the year I can find 12-packs for $2.00 each, granted that is a good price. I usually stock up when I find them that low, at least for my better selling sodas.
It won't take bills, and at times it will take coins. I think the error on the bill acceptor might be confusing the coin operation eventually.
I just took the bill exchanger apart even more (unscrewing it, etc) and I found a piece of a shredded bill inside. I am going to finish putting the bill accepter back together today and see if that fixes it. If not I will order up a new one.