Genesis 47:15-17

"And when the money was all spent in the land of Egypt, and in the land of Canaan, all the Egyptians came unto Joseph, and said, Give us bread: for why should we die in thy presence? for our money faileth. And Joseph said, Give your cattle; and I will give you for your cattle, if money fail. And they brought their cattle unto Joseph; and he gave them bread in exchange for the horses, and for the flocks, and for the herds, and for the asses: and he fed them with bread in exchange for all their cattle for that year."

This was stage two. "That year" as mentioned here is ambiguous, the exact year of the famine not being indicated.