Question

how do we count various goods and services and know the total production in each sector

Answer 1

services account more that the half of the country's  national income and employ about a third of the total population of country.can find productivity of a sector.

Answer 2

Gross Domestic Product (GDP) is a financial measure of the market assessment of all the final goods and services offered in a period of time, oftentimes yearly or periodically in each sector. Nominal GDP measures are ordinarily employed to conclude the commercial production of the country or province, and to make global estimation.