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9/27-9/28/04 Contest Puzzle

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The rules for the contests can be found on the ContestsPage and the list of prizes you can win are on the PrizesPage.

Send your answer to [email protected]. Please DO NOTsend your answer if it is after NOON Central StandardTime of 9/28/04. You may only submit one answer percontest, and please only submit answers to onecontest in each e-mail you send. Unless you answerthe puzzle correctly AND are declared the winner, youwill not receive a reply to your email. The answer,explanation, & winner will appear on the ContestsPage immediately after the contest is over. The ContestsPage has an archive of all past contests.

Today's Puzzle Contest:

THIS PUZZLE IS TOAST

Chef Puz D. Comm is preparing orders of toast for 3 customers, who for purposes of simplicity all ordered at exactly the same time, and the time to place bread in and remove toast from the toaster is negligible. Puz has two toasters that can each toast 2 pieces of bread at the same time, and 1 knife to apply both butter and jam.

It takes 1 minute to lightly toast 2 pieces of bread
It takes 1 minute, 30 seconds to moderately toast 2 pieces of bread
It takes 2 minutes to darkly toast 2 pieces of bread

It takes 10 seconds to apply butter to a piece of toast
It takes 15 seconds to apply jam to a piece of toast

Customer A wants 4 pieces of toast, moderately toasted, with butter on each piece

Customer B wants 2 pieces of toast, lightly toasted, with butter and jam on each piece

Customer C wants 3 pieces of toast, darkly toasted, with butter on 1 piece, nothing on the others

What is the shortest possible combined time that the customers will have to wait for their orders to be up? For example, if A had to wait 2 minutes, B 1 minute and C 30 seconds, total time would be 3 minute 30 seconds. You are encouraged to explain your answer, but it is not required.

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