Production profit is not only the sale price minus the listed ingredients. Resource return rate, focus cost, specialization, item quality, crafting fees, taxes, journals, and non-returnable ingredients can all change the result. The calculators expose these inputs instead of hiding them behind one unexplained profit number.
A saved profile supplies specialization values to supported calculations. Manual overrides remain useful when testing another character, a different city, or a future setup without changing the saved profile.