What did the horseman mean by "A measure of wheat for a penny, and three measures of barley for a penny"?

A quart of wheat was the daily ration for a solider. The ration would cost a Denarius, a day's wage. This indicates that in the last days during the ride of the four-horsemen that in many parts of the world famine, and a lack of food would happen. That is what was indicated by the black horse. We are living in that time now. It is estimated that a child dies of hunger every 2 seconds. And that a 1/5 of the world goes to bed hungry every night.