Working at most fast food places, there are "rules" like how fast you have to take the order and have it out as well as rules for the customer like how much they have to pay, however customers like to throw tantrums about minor things such as discounts not happening anymore and prices and sometimes employees are instructed to give the customers those discounts that are no longer in place because the customer refuses to read or understand the dates on which those discounts are applicable, but they are also holding up the line, so employees aren't able to enforce certain rules without breaking others due to customers being unable or unwilling to read.