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Puzzles in the laundry

Puzzles in the laundry

Charlie and Freddie have taken to wash the necks and cuffs of their shirts that add thirty pieces in total.

Freddie explains to the clerk that his package contains half of the cuffs and a third of the necks and that it should cost twenty-seven cents.

As four fists cost the same as five necks, the clerk, who is a bad mathematician, wants to know how much do you have to charge Charlie for the other package.

Solution

If there are 30 pieces to wash and Freddie has been charged 27 cents for half of the fists and one third of the necks there must be 12 fists and 18 necks in total so Charlie will have to pay 39 cents since the necks cost 2 cents and fists 2.5 cents.