The displacement of the relative prices of the milk producer and the main inputs that make the activity has become dramatic. The value required to make the box with respect to the account of Power (60% of production costs) would be 11 $/lt. ! (28 hp US$/lt), this is a 37% more of the 8$/lt expected for milk delivered in September. The value required to reach the break of the dollar would be $13/lt. (33 hp US$/lt). The recovery of production that was observed at the beginning of year where the 1st quarter averaged +9.4 per cent over the same period of 2017 slowed down significantly due in large measure to the loss of purchasing power of the milk in front of the main inputs, as are the Balanced Food (AB), gas Oil (GO), dollar sign (70% of input dollarized) and soybean (rentals and protein supplements).