Clerk: A good rule of thumb is two years' salary,

Clerk: A good rule of thumb is two years' salary, sir. Try
this.
Principal Skinner: I can't afford that, I'm an educator!
Bart: Seymour...
Principal Skinner: I'll take it.
-- Buying an engagement ring for Patty,
"Principal Charming"

Related:

• Principal Skinner: I'm going to ask for your Aunt Patty's hand in marriage.
  Bart: It's your funeral, Seymour. -...
• I tried to repel him, I really did! -- Patty to Selma,
  on Principal Skinner, "Principal...
• Principal Skinner: So, see me again tomorrow? Patty:
  [grunt] I'm afraid that's my microwave cookery class...
• I will not bribe
  Principal...
• I WILL NOT BRIBE PRINCIPAL SKINNER I WILL NOT BRIBE
  PRINCIPAL SKINNER I WILL NOT BRIBE PRINCIPAL SKINNER...
• I suggest we start with the Springfield Revolving Restaurant.
  You know, food tastes better when you're revolving...
• Oh, Springfield Elementary! I will have you back again.
  After all, tomorrow is another school day! -- Principal...
• Say what they will about our cafeteria, I still think they're the best tater tots money can buy.
  Principal Skinner eats his lunch at school, "Principal...
• Skinner: Oh, I hope I didn't miss the floor show. Bart:
  Nope. Skinner: Is Roxanne back? Bart: Yep. Skinner...