Make sure you let the cashier know you are price matching before starting the transaction. Also, the competitor store, which in this case is Kroger, needs to be located within a 50 mile radius of your Walmart.
If you don’t want to price match, use Walmart’s Savings Catcher! It automatically price matches for you. Submit any receipt to Savings Catcher within seven days. If Walmart finds a lower price with a local competitor, they’ll give you the price difference via a Walmart eGift card. Score! Click on the logo below.