Given that mill worth originally =3ooooo

Depreciation for 1 yr =300000x5/100= Rs. 15000

Then, depreciation for 5yrs = Rs. 75000

Value after 5yrs = 300000 - 75000 = Rs. 225000

Given Selling Price of the mill = Rs. 250000

Sp > CP

Gain = 250000 - 225000 = Rs. 25000

Gain% = 25000/250000 x 100 = 10%.

Creditors and debtors:

During inflation creditors lose because they receive in effect less in goods and services than if they had received the repayments during a period of low prices. Debtors, on other hand, as a group gain during inflation, since they repay their debts in currency that has lost its value.The aggregate volume of internal trade tends to increase during inflation due to higher incomes, greater production and larger spending. But the export trade is likely to suffer on account of arise in the prices of domestic goods.

The same currency unit will now buy less goods and services.But the bondholders lose as they get a fixed interest the real value of which has already fallen.

Depreciation is a process of cost allocation, not valuation. In accounting, the term depreciation refers to the allocation of cost of a tangible asset to expense to the periods in which the asset is expected to be used to obtain the economic benefit.

In brief, Depreciation is fall in the value of assets due to wear and tear over a period of time, it is a loss.

Gross Domestic Product : 

It is the total value of all final goods and services produced within the boundary of country during the given period of time. 

Gross National Product :

It is the total value of the total output or production of final goods and services produced by the nationals of a country during a given period of time. 

Gross National Income : 

It is the total domestic and foreign output claimed by residents of a country, consisting of gross domestic product (GDP) plus factor incomes earned by foreign residents, minus income earned in the domestic economy by non-residents.

Net National Product :

The total value of goods produced and services provided in a country during one year, after depreciation of capital goods has been allowed for.