What kind of taking from the store did you do? As I said earlier, he doesn’t own customers. Besides, being that the woman thinks she was advised by the store not to purchase the cones, you only gave the place a good reputation.
If you refuse to accept what I’m saying (Chas Vishalom) and you still feel like you owe him something, all you would owe him is a customer, or some business. So, go and buy yourself some very expensive and fattening ice cream, with a happy and fulfilled conscience. Perhaps you can post some leftovers in the coffee room.