Coldwell Banker is employing 10 acres of land and 50 tons of cement to produce 1,000 parking spaces. Land costs $4,000 per acre and cement costs $12/ton. For the input quantities employed, MPL = 50 and MPC = 4. Show this situation in an isoquant-isocost diagram. Explain, and show in the diagram, how Coldwell Banker can produce the same output at a lower total cost.