Who was in the wrong in my Safeway Courtesy Clerk firing?

I worked for safeway they suck. But you should have said to supervisor or manager that you were off in 4 mins. If you clean the spill that will put you in overtime which they are obligated to pay. That way its the managements decision. To leave a job only partially done for the next clerk was pushing your luck. Reason 1 i totally agree with as i caught hell for the same thing. No one can hear announcements when in the parking lot collecting carts! Did you explain your situation to the manager?