Allow for there to be a negative cash balance in a driver's account.
It only allows you to make a cash drop for the total amount of cash orders on a drivers account plus bank. It doesn't take into account cash tips they may receive. Because of this, instead of simply being able to make a drop quickly, it forces us to go back and add a tip to one of the cash orders so that the system recognizes there is enough cash to make a drop. A completely unneccessary step.