Dad arrives home from work with his paycheck. He gives two-thirds of it to his dear wife. She then
gives one-fourth of her share to her 3 children so that each child gets an equal amount. Her daughter
then gives one-third of her allowance to her friend for helping her with her chores. The friend spends
one-half of this money buying 4 songs to download to her iPod. If each song cost the same amount,
how much did one song cost if the original amount of the paycheck was $864?