A, B and C entered into a partnership with capitals in the ratio \(\frac{5}{8}\), \(\frac{2}{5}\), \(\frac{3}{4}\). After 6 months, A increased his capital by 20%, B increased his capital by 50% and there was no change in the capital of C. If the difference between the shares of B and C in the annual profit is ₹2,80,000, then the annual profit (in ₹ lakhs) was: