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If the sale is 95% OFF   then you pay only 5%

5%  x 57 =

.05 x 57 = 2.85  = sale price

If the sale is pay only 95% of original price (the Q does not say which way the sale works)

then you pay    .95 x 57

57 : 100% = X : 95%        X = 54.15

Discounted price will be  $ 54.15  +tax