A—Traditional school plant: 8 rooms; 320 children; grounds 160 × 160; playgrounds, 80 × 160, 40 square feet per pupil:—
| Cost of building and equipment | $55,000 |
| Cost of land | 5,000 |
| 10 per cent on investment | 6,000 |
| Annual operation | 2,000 |
| Cost of instruction per year | 10,000 |
B—Gary plan for 320 more pupils:—
| Additional cost of land | $5,000 |
| Additional cost of instruction per year | 10,000 |
Costs of building and equipment, operation and maintenance not increased, though capacity is doubled.