Answer: Mental budgeting.
Explanation: This concept is very much in consistent with the concept of mental accounting. The concept of mental accounting says that a person has already classified the areas where he will be spending his income and each area has its own importance and is given particular amount to that. Contrary to this, however, the mental budgeting is the phenomenon which uses the same technique but in such a way that it calculates the amount to be spend on multiple areas beforehand and using the rational cognitive ability, imagine the possibility that if an area would be left without spending money on that, would that help him save or not.