On the basis of the given data, estimate the value of National Income (NNPFC):
| S.No. | Items | Amount (in ₹ Crore) |
| (i) | Household Consumption Expenditure | 1,800 |
| (ii) | Gross Business Fixed Capital Formation | 1,150 |
| (iii) | Gross Residential Construction Expenditure | 1,020 |
| (iv) | Government Final Consumption Expenditure | 2,170 |
| (v) | Excess of Imports over Exports | 720 |
| (vi) | Inventory Investments | 540 |
| (vii) | Gross Public Investments | 1,300 |
| (viii) | Net Indirect Taxes | 240 |
| (ix) | Net Factor Income from Abroad | (-) 250 |
| (x) | Consumption of Fixed Capital | 440 |
National Income (NNPFC) is derived by deducting depreciation (Consumption of Fixed Capital) from the Gross National Product (GNP).
Initially, the Gross National Product (GNP) at factor cost is computed: \[ \text{GNP} = C + I + G + (X - M) + \text{Net Factor Income from Abroad} \] In this formula: - \(C\) represents Household Consumption Expenditure, valued at ₹1,800 crore.
- \(I\) signifies Gross Business Fixed Capital Formation plus Gross Residential Construction Expenditure plus Inventory Investments plus Gross Public Investments, totaling ₹1,150 + ₹1,020 + ₹540 + ₹1,300 = ₹4,010 crore.
- \(G\) denotes Government Final Consumption Expenditure, amounting to ₹2,170 crore.
- \((X - M)\) indicates the Excess of Imports over Exports, quantified at ₹720 crore.
- Net Factor Income from Abroad is ₹-250 crore.
Substituting these figures into the GNP equation yields: \[ \text{GNP} = 1,800 + 4,010 + 2,170 + 720 + (-250) = 8,450 \text{ crore} \] Subsequently, to ascertain National Income (NNPFC), the consumption of fixed capital (depreciation) is subtracted: NNPFC = GNP - Consumption of Fixed Capital
NNPFC = 8,450 - 440 = 8,010 crore.
Therefore, the National Income (NNPFC) is established at ₹8,010 crore.

In an economy, exclusion of _______ may lead to under estimation of the value of Gross Domestic Product (GDP).