Amit's income per month = ₹32,000
Money spent on food =
Remaining amount = ₹32,000 − ₹8,000 = ₹24,000
Money spent on house rent =
Money left = ₹24,000 − ₹7,200 = ₹16,800
Money spent on education of children =
Amount of money still left with him = ₹16,800 − ₹4,000 = ₹12,800