You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Q: Category: I'M JUST RUNNING IN FOR... 
Clue: ...20 first-class stamps, which will now cost this much total

A: $7.40
****
Q: Category: DRAMA 
Clue: This play begins as Willy Loman returns home from a trip

A: death of a salesman
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Q: Category: ANATOMY 
Clue: The tongue's taste buds distinguish 4 basic tastes: salty, bitter, sweet & this one

A:
sour
****