Alright,if erm, if we now  so this is going to be his sort of, his opportunity cost right, his wage rate in the rural sense is going to, to opportunity cost, and the sum of the opportunity cost over time right, is going to be the present, you know if we discount that by some er, if we turn it into a present, a present value, right, the present value of that sum there, right, will determine life times income in agriculture.