Let the total profit be ₹ N,
Then, A's share in profit = ₹ 3N/5
Remaining profit = N - 3N/5 = (5N - 3N) / 5 = 2N/5
∴ B's share in profit = ₹ N/5
C's share in profit = ₹ N/5
According to the question,
(3N/5 - N/5) = 400
2N/5 = 400; N = (400 x 5)/2 = ₹ 1000