Gross profit = Net sales (total receipts) - Cost of goods  sold (total expenditure)

In other words it is the total receipt over total cost.

Expl:- When increase in income the increase in ratio between income & expenditure changes Ratio less than 1

For private corporate sector, retained profits adjusted for non operating surplus/deficit is considered as net saving

Under the consideration of India economy, census of agriculture, is done by production method.