Help translate a joke into English, thank you.

Once upon a time, Tom and Jack went on a trip. They came to a jungle. At first they were both happy, but slowly they began to get tired and fell asleep in the jungle. The next day, Tom was awakened by Jack. Jack said to Tom, "There is good news and bad news; Which do you want to listen to first? " Tom replied, "Let's start with the bad news." Jack said, "The bad news is that we are lost and can't go out. We have no food and can only live by eating cow dung." Then Tom asked, "What's the good news?" Jack replied, "The good news is ... there is a lot of cow dung to use."