Suppose that a student is determining the total base content of an antacid tablet by performing a back titration. He/she weighs out a .3012g portion of a tablet whose total weight is 1.5312g, dissolves this in exactly 40.00mL of DI water, and then adds exactly 30.00mL of 0.1000M HCl in order to bring the pH down to 1.9. This solution is then carefully back-titrated with .2000MNaOH with 12.5mL required to reach the equivalence point. Calculate the total base content (The total # of mmoles of base contained) of the antacid tablet.