In measuring GDP as the sum of all incomes earned in production, we should include: purchases of used goods. purchases of used goods. American purchases of foreign output. American purchases of foreign output. wages and salaries. wages and salaries.

wages and salaries.

Explanation:

GDP is an acronym for Gross Domestic Products (GDP) and it can be defined as a measure of the total market value of all finished goods and services made within a country during a specific period.

Simply stated, Gross Domestic Products (GDP) is a measure of the production levels of any nation.

Basically, the four (4) major expenditure categories of GDP are;

I. Consumption (C).

II. Investment (I).

III. Government purchases (G).

IV. Net exports (N).

Additionally, it is a measure of the total income of all individuals in an economy and the total expenses incurred on the economy's output of goods and services in a particular country.

In measuring GDP as the sum of all incomes earned in production, we should include wages and salaries of the people working in a particular country.