Answer:
Decreases.
Explanation:
The law of demand states that for an elastic good an increase in price results in a decrease in quantity demanded.
Elasticity of demand is the degree of responsiveness of quantity demanded to changes in price.
When a good is highly elastic that means the elasticity is above 1. For example if elasticity is 2, an increase in price by 1 unit will result in a decrease in quantity supplied by 2 units.
As total revenue is equal to price multiplied by units sold, total revenue will also reduce with price increase of a highly elastic good.