There shall be allowed to each district a maximum area for the attendance units of the district in grades 9 to 12, inclusive, determined by computing, for the attendance units in grades 9 to 12, inclusive, at each attendance center of the district, a number of square feet for the number of attendance units in such grades at each attendance center, in accordance with the following table, and totaling the number of square feet so determined for all attendance units in such grades of all attendance centers of the district:
Attendance units of attendance center
Maximum number of square feet of building area
1-50 18,000
51-100 18,000
plus 162 for each attendance unit over 50
101-200 26,100
plus 99 for each attendance unit over 100
201-300 36,000
plus 60 for each attendance unit over 200
301-600 42,000
plus 54 for each attendance unit over 300
601-1,800 58,200
plus 80 for each attendance unit over 600
Over 1,800 154,200
plus 85 for each attendance unit over 1,800