Cost refers to the material or energy paid to achieve a certain purpose, or some trade-offs, pays, inputs, and consumptions, such as doing more with the least cost. What does the following mean for this price? ['Costs were seen in daily life.', 'People seek maximum profit in economic life at the least cost.', 'Cost is a measure of reason.', 'The price is the inherent inevitability of human development based on history, and the subject of social practice is the realization of the dominant development goal and the further reasonable development of the entire society.']