How old is Po?

In Kung Fu Panda 2, Shen was banished when Po was an infant and mentioned that he waited 30 years for the moment when he came back after being banished.

In Kung Fu Panda 3, Mr. Ping mentioned that he raised Po for 20 years before he told Po he was adopted.

In Secrets of the Scroll, Po was teenager 10 years ago.