Then rearrange the positions of the nodes such that the new node is located above the three others. You may have to move them all to achieve this. (The locations of the nodes do not really matter, but the diagram will be easier to read and understand if you have managed to make it look tidy.)
Link the 窶廸umber of chocolate bars窶 node to the 窶弃roduction cost窶 and the 窶彜elling price窶.
