Amusic player was marked down by 1/4 of the original price.
a. if the sales price is $128, what is the original price?
b. if the music player was marked up by 1/2 before it was placed on the sales floor, what was the price that the store paid for the player?
c. what is the difference between the discount price and the price that the store paid for the music player?

anyone : ( it is due tmm
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