Would it be possible to include a value which is the total cost of all the buildings and upgrades? It would solve questions like how much it would cost to buy the 200th prism optimally
This would be a single value on the information page.
Any upgrade/building savings you have purchased would be applied to everything (This means its not quite the actual cost which is impossible to calculate).
The difference in cost between two different sets of buildings is also interesting but I don't know how you would do this. However with the total, I can do this by seeing the total of each and then doing my own subtraction.