Final answer:
The total commission earned by the broker is Rs 5,700.
Step-by-step explanation:
To calculate the total commission, we need to find the commission for the first Rs 80,000 and the commission for the rest of the amount.
Commission for the first Rs 80,000 = 1.5% of Rs 80,000 = Rs 1,200.
Commission for the rest of the amount = 3% of (Rs 2,30,000 - Rs 80,000) = 3% of Rs 1,50,000 = Rs 4,500.
Total commission = Rs 1,200 + Rs 4,500 = Rs 5,700.