二、生产弹性与生产投入三阶段的划分 The point of profit maximisation The level of input where mc=mr is where profit is maximised -the optimum O MC=MRie. the cost of an additional unit of input is the same as the value of the output which results-so you can't squeeze out any more increments to profit o This is also the maximum vertical distance between TC and tri.e. the total profit from applying the input.二、生产弹性与生产投入三阶段的划分 The point of profit maximisation l The level of input where MC=MR is where profit is maximised - the optimum l MC=MR i.e. the cost of an additional unit of input is the same as the value of the output which results - so you can’t squeeze out any more increments to profit. l This is also the maximum vertical distance between TC and TR i.e. the total profit from applying the input