What shop is this? I've never heard of needing a thermometer for a gas station shop?
Are you talking about the food service shops in the Circle K and Murphy stations? I used to do the Circle K audits years ago, they are supposed to have a meat thermometer in the hot dog roller to check the hot dogs. You do not need to buy an infrared thermometer for checking meat, it's not a reliable way to check the temperature of meat. It only tells the surface temp, not the temperature of the meat inside.
If you think you need to own a thermometer to test food so that you dont have to rely on the stores, then look on Amazon, they have some very nice instant read digital food thermometers for not a lot of money.
The stores are supposed to test the hot dogs on the roller grill periodically through the day, so they are in violation if they do not have a thermometer with a probe to insert in the meat on the roller grill.