Truckload of Chickens

A man took a truckload of chickens to market. In the first hour, he sold half of his birds, and half of a chicken. The next hour, he sold one-third of his remaining chickens and one-third of a chicken. In the third hour, he sold one-fourth of what had been had left, and three-fourths of a chicken. The last hour, he sold one-fifth of the chickens, and one-fifth of a chicken. He did not need to cut up any chickens to sell them. Finally he returned home with 19 chickens.

How many chickens did he take to the market?