"What do you mean I can't have the free meal?" The fat lady with short blonde hair complained with her hands on her waist as she stared at the pretty cashier fiercely.
The cashier smiled wryly and explained with a patient tone, "Ma'am it's not that we can't, it's just that our promo states that we will be giving 1 free meal for the first 100 customers for our opening event."
The fat lady with the blonde short hair snorted coldly, "So? I am one of your first 100 customers. Why aren't you giving me the promised free meal then!?"
The cashier sighed and looked at her helplessly, "But ma'am, you already availed your free meal earlier. The flyer clearly states that 1 free meal for the first 100 customers, and indeed you belong to the first 100 customers, but you also received your free meal earlier already."