Are the following stocks or flow variables?
(i) Investment
(ii) Monetary Expenditure
(iii) A Hundred Rupee Note
(iv) A Family's Consumption of Sugar
(v) Services of a Tutor
(vi) Production of Cement
(vii) The machinery of a Sugar Mill
(i) Investment: It is a flow concept because it is related to a period of time.
(ii) Monetary Expenditure: It is a flow concept because it is related to a period of time.
(iii) A Hundred Rupee Note: It is a stock concept because it is a component of money supply, which is a stock variable.
(iv) A Family's Consumption of Sugar: It is a flow concept because consumption is related to a period of time.
(v) Services of a Tutor: It is a flow concept because it is related to a period of time.
vi) Production of Cement: It is a flow concept because it is related to a period of time.
(vii) The machinery of a Sugar Mill: It is a stock concept because it is related to a point of time.