The relationship between, total expenditure and price elasticity of demand has summed up in the below table:

Table: Elasticity and Consumption Expenditure

As illustrated in Table above, when e_ce> 1, for example demand is elastic, an increase in price causes more than proportionate decrease in quantity demanded. Therefore, total expenditure decreases. And, if price decreases quantity demanded increases more than proportionately. Consequently total expenditure increases.

When e_ce = 1, a rise (or fall) in price causes a proportionate fall (or rise) in quantity demanded leaving total expenditure unchanged.

When e_ce< 1, it implies when demand is inelastic, a rise in price causes a rise in the total expenditure since demand decreases less than proportionately and a fall in price decreases it as quantity demanded increases less than proportionately.