profit sharing Questions

A and B invested money in a business in the ratio of 2:3. If 10% of the total profit goes to charity and A's share in the profit is ₹4,500, then what is the total profit?

A started a business with a capital of $\text{Rs. }1,12,000$. After $2$ months, B joined the business with a capital of $\text{Rs. }80,000$, and after another $2$ months, C joined the business with a capital of $\text{Rs. }72,000$. After $10$ months from the start of the business, B withdraws $\text{Rs. }8,000$ and C also withdraws $\text{Rs. }8,000$. If B received $\text{Rs. }9,800$ as his share in the profit at the end of a year, then the total profit was: