Cost price of 1 litre of milk = C.P = Rs 15
∴ Cost price of 70 litres of milk = Total C.P = Rs 15 × 70 = Rs 1050
Total Selling Price = Total S.P = Rs 1260
Since, Total S.P > Total C.P, a profit is made.
Profit = Total S.P ˗ Total C.P
= Rs 1260 – Rs 1050
= Rs 210