Mathematics of investment حسب Altares, Priscilla S., Arce, Ma. Teresa B, Aquino, Abner A., CoPo, Antonio Roland I., Howe, Asuncion B., Laddaran, Angeline T., Mananquil, Claro T., Sy, Evangeline Agueda G., Tizon, Helen D., Villanueva, Antonio, Yao, Ana Maria S.D