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Cost this two word, look is very simple, but accurately understanding is not easy. In daily life, everywhere you can see about cost phenomenon. Eat a meal spent 20 yuan, see a movie spend 30 yuan, these currencies as pay cost, this is the understanding of the costs of ordinary people. In fact, the true costs of movies include not only 30 yuan, and includes for the movies and give up the price of other USES. It is simple, watch movies need to two hours, work reward is 20 yuan an hour, so give up work the chance to see the movie cost is 70 yuan. If today is Sunday, you have no matter to do, then see a movie cost will decline.

Inevitably the highest price is cost. Cost for choice of the cause, have no choice is no cost. Give up the most massive using value is cost, also is in a variety of purposes, with the highest value to give up a. A man can use two hours reading, tutor, have a rest. His heart is worth reading evaluation of 20 yuan, tutor can earn to 50 yuan, the dc hats rest is 30 yuan. If he chooses to tutor, give up the highest price is to rest, then he tutor cost is 30 yuan. If the tutor prices to 40 yuan, and he rest using value up to 50 yuan, then he would choose to rest.

The historical cost is not the cost, the past into, for now is no longer cost. A businessman in 5 yuan stock, but once completed, how much money but according to sell with 5 yuan has nothing to do, because this 5 yuan is no longer the cost. Now the price is the cost, that is now sells for just affect the businessman exactly is for sale. As a businessman, he always try every way to sell the highest prices, and never consider purchase cost.

An investment, once completed, so it is no longer the cost. In 2 billion yuan to build a bridge, once built, the 2 billion is sunk into, is unable to recovery. No matter how the bridge returns, this 2 billion yuan is couldn't get back. Maintain the bridge normal operating costs of is the cost, as long as the bridge to earn income more than maintain operation costs, that the bridge should be on business. Of course, the bridge can also be transferred to others, but others offer basis is not the bridge spent 2 billion yuan, but the future of the expected benefits. Give up the bridge of the cost is not the past spent 2 billion yuan, but the bridge benefits to each year discount a present value.

In simple terms, the cost is expected, the past is not cost input. Prepare to build a bridge, we will consider the bridge built good, benefits and costs compared, if the expected benefits greater than expected cost, then it is worth it. But bridge construction, the buy sunglasses investment is ShuiNan before the shoe.

Maintain the bridge normal operation needs certain expenses, such as maintenance, artificial cost, etc. How to collect fees, of course the price, the higher the better, but reduce vehicle, and the total revenue will be reduced. Here, it must through the survey way, develop a can realize gross income maximization price. If this year fee is 5 million yuan, and to earn income is 95 million yuan, so 90 million dollars will be can be thought of as rent value. After all, the bridge spend how many money, construction of now no longer affect behavior. From this point of view, the above costs can be as rent value.

All the past into, all isn't a cost. Cost for choice of the cause, so only when faced with a choice, the cost will happen. Once the choice was complete, and it is no longer the cost. Whether you choose a bridge construction, to build it, you'll have to spend 2 billion yuan, but if was decided, $2 billion into the bridge construction is good, then you no longer have a choice problem, so there is no cost.

All of the options are happen present or future, so the cost is to the present or future affair. The historical cost is not cost, as the historical choice is not choice. Judgment of the cost method, the key is to look whether to make a choice.