A solid material is known to enclose potassium biphthalate, KC8H5O4 and other inert materials. A 3.025 gram sample of this material is dissolved in 100mL water as well as titrated with 0.0875 M potassium hydroxide. It takes 23.78mL of KOH solution to reach the end point. Explain how many moles of KOH were used in the titration?