the value of goods and services produced within the nation,charged at ruling prices; prices include all taxes on expenditure,subsidies being regarded as negative taxes; gross domestic product at market prices represents the final result of the production activity of resident producer units, The income side GDPmp (N 1) is the sum of compensation of employees (R 10), gross operating surplus of the economy (N 2), and taxes linked to production and imports (R 20) less subsidies (R 30).