Urgent ~ help me translate this joke,,,

A man's dog died. Before he buried the dog. He took the dog to the vet to make sure it was really dead. The vet said to put the dog on the table. Then he opened the door of a small box. A cat came out, walked around the dog and returned to the box. Then the vet closed the door. The vet said, "Yes, your dog is dead. Please pay $200. " The man said, "Don't you think $200 is a little expensive just to make sure my dog is dead?" . The vet said, "Well, $40 is my expense, 160 is the cat's."