Cookie Monster as a Doctor

Cookie Monster asks Ernie if he has any cookies. Ernie says that he doesn't have any cookies but an apple and he can't give the apple to him because "an apple a day will keep the doctor away." Later Cookie Monster comes disguised as Doctor Monster and gives Ernie a medical checkup. After the checkup, Ernie asks what he owes Doctor Monster. By sheer coincidence, his bill is one apple.