SECTION 1. A monthly bonus in addition to their basic salaries shall be given to public school teachers and other low-salaried employees embraced in Grades 10-7 of the present scale of salaries, as follows:
(a) For rates in Grades 10, 9, and 8:P30.
(b) For rates in Grade 7: P25 for rate P80; P15 for rate P90; P5 for rate P100: Provided, however, That a teacher or employee in this grade receiving salary other than any of the said rates shall be given a monthly compensation of P105, including bonus.