The difinition of term

1.demand

Demand is the power which is going to change goods for money.We define demand as the union of wants and money.It is neither only wants nor only money.
Realizing this two elements which is included in the term "demand" is necessary for economics in the future.
So demand can approximately stand for the following expression.
D=M∧W
D is demand.M is the population that have money which can buy the goods.Y is the population that have wants in M.∧ is logical product.


2.goods and money

Goods is the thing which has value in use or utility in other words.
Money is the thing which has value for exchange and also become goods by value of its material.




3.price

The price is expressed following equation.
P=(D/S)×p
=((M∧Y)/S)×p
P is price.D is demand.S is the quantity of supply of the goods.P is as it were price constant in that goods.
For example,about a tomato,if its p is 100,the population that have money which can buy the tomato is 200,the population that have wants in the population above is 100,the supply of tomato is 50,then
P=((200∧100)/50)×100
=200.




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