I exchanged my empty propane tank and purchased a tank of propane at the Amerigas vending Machine at the Walamart. However, tgenewly vended tank was EMPTY. Purchased at the vending machine at Walmart 6315 S. Elm Broken Arrow, OK 74011. Total with sales tax was 16.18. The machine said it could not print a receipt, so all I will have is the credit card statement.