Burgers always out of stock

On the 04/12/2015 at 21:16 I went to buy a burger from KFC. It is then the cashier told me they were out of stock, and I told her that it is not the first time I came there and always the burger was out of stock. She then called her manager, Mary/Maggie (if I'm not mistaken), she also confirmed that they are out of stock, and that they have limited stock because they are not the busiest food outlet so they get out of stock quickly. She the said to me, \maybe I have bad luck"that everytime I go there burgers are out of stock.<br> Now my question is why can't you order more stock"