It is desired to obtain NaOH from the NaCl contained in a mixture of salts that also contains KCl and KBr. The analysis of this mixture of salts shows a Potassium content of 9.5% and a Chlorine content of 55.7%. Find the minimum amount needed of this mixture of salts. to obtain 1500 Tc of NaOH.

Tc refers to the unit of mass "short tons"