The elasticity of demand equals one and consumer spending upon Robot Butlers (there is the firm’s total revenue), is at a maximum at a price of as: (1) $20,000. (2) $15,000. (3) $10,000. (4) $5,000. (5) zero.
![552_Price Elasticity of Demand3.png](https://secure.tutorsglobe.com/CMSImages/552_Price%20Elasticity%20of%20Demand3.png)
Please choose the right answer from above...I want your suggestion for the same.