The document discusses calculating national income using the factor income method. This involves:
1. Summing factor incomes including wages, rent, interest, profits and self-employment earnings to get National Domestic Product at Factor Cost (NDPFC).
2. Adding Net Factor Income from Abroad (NFIA) to NDPFC to get Net National Product at Factor Cost (NNPFC).
3. Calculating domestic income, national income, net national product at market price, and gross national product at factor cost using various components of factor incomes and net factor incomes from abroad.