Arestaurant bill comes to $28.35. find the total cost if the tax is 6.25% and a 20% tip is left on the amount before tax

Bill was for $28.35.  A 20% tip would come to $5.67.  If we add this tip to the $28.35 bill, we get a total of $28.35 + $5.67 + 0.0625($28.35)
                                                   = $35.79 (total)

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