On Monday, March 17, Sonic Drive-In is sharing a bit o’ luck with your wallet by offering its cheeseburgers at 50% off. The burgers are prepared with 100% pure beef, melty cheese and fresh ingredients — all made to order. (If you don’t like cheese, just order a cheeseburger without the cheese and still salivate over the savings.) There’s no limit, so everyone in your family can chomp on a “cheap” cheeseburger. The deal is valid at participating restaurants. For locations, click here.