The value of a country's overall output of goods and services (typically during one fiscal year) at market prices, excluding net income from
abroad. Good a service,ผลิตภัณฑ์,รายได้ รายจ่าย
(1) Expenditure basis: how much money was spent,
(2) Output basis: how many goods and services were sold, and
(3) Income basis: how much income (profit) was earned.