Calculate Monthly Savings

Given that Mr. Hari saves ₹1,80,000 every year, his monthly savings is calculated by dividing by 12.

$\text{Monthly} \; \text{Savings} = \frac{1,80,000}{12} = \text{₹}15,000$

Find Amount Remaining Before Savings

He saves half of the remaining amount after all expenses. Thus, the total remaining amount after food, clothes, medical, and conveyance is double his monthly savings.

$\text{Remaining Amount} = 15,000 \times 2 = \text{₹}30,000$

Find Amount Remaining After Food

He spends 25% of the remaining amount after food on clothes, medical, and conveyance. This means 75% of the amount after food is left.

$\text{Amount after food} \times 0.75 = 30,000 \implies \text{Amount after food} = \frac{30,000}{0.75} = \text{₹}40,000$

Calculate Total Monthly Income

He spends 36% of his income on food items, leaving $100\% - 36\% = 64\%$ of his income.

$\text{Income} \times 0.64 = 40,000 \implies \text{Income} = \frac{40,000}{0.64} = \text{₹}62,500$