Answer:
In economics a demand is defined as the quantity of goods and services that customers are capable to buy and that they find desirable to buy at a particular price for that period of time .
Demand is dependent on the customer's needs and wants each customer may have different things that they consider to be needs to them and those they consider as just wants.
This also depends on affordability, if one doesn't have the money to buy the product then the demand isn't effective.
When the price of the product rises usually it's demand decreases and vice versa when the price fall the quantity of that product demanded will increase.
Here is the formula to calculate GDP:
GDP<span> = C + G + I + NX
</span>Where I is the investment that include all form of capital expenditure
Both sales mentioned above could be considered as a form of Capital expenditure, so the total contribution to GRP would be:
$30 + $ 15 = $ 45
The following will contribute to an increase in real GDP from year to year which includes Capital deepening, increases in imports, increases in technology. Letter (C) decreases in population does not really affect and contribute to the increase in real GDP since people is considered as manpower. Decrease of manpower means that there is also a decrease in real GDP.
The United States and the United Kingdom share enormous trade and economic relations. Each country is among the other's top trading partners.
Property? there is not much to go off of for this question