The number of bilingual multicultural education program units is determined by multiplying the full-time-equivalent MEM in programs implemented in accordance with the provisions of the Bilingual Multicultural Education Act [N.M. Stat. Ann. Chapter 22, Article 23] by the cost differential factor 0.35, effective July 1, 1990; 0.4, effective July 1, 1991; .425, effective July 1, 1992; 0.45, effective July 1, 1993; and 0.5, effective July 1, 1994.