In another sign that budget cuts are making it harder to go to college, Santa Monica College has adopted a two-tier course pricing system. The governing board of the two-year school has approved creation of a nonprofit foundation to offer such high-demand classes as English and math at a cost of about $200 per unit. The higher-cost classes, which could be offered as early as this summer, would become available after state-funded classes fill up. State budget cuts have required the south state college to cut as many as 1,000 class sections in four years.