We have box of chips, biscuits and rice in a trolley, kept in order as rice in the lowest, then biscuits, and chips in the top. I need your help to transfer them in my carry bag by keeping them in another trolley in between. We can only transfer one box at a time and we cannot kept lower box (i.e. rice) in top of any higher element (i.e. biscuits). Please suggest the steps required and mention position of each box.