The following sketch shows the pipelines carrying material from one location to another. Each location has a demand for material. The demand at Vaishali is $400,$ at Jyotishmati is $400,$ at Panchal is $700,$ and at Vidisha is $200.$ Each arrow indicates the direction of material flow through the pipeline. The flow from Vaishali to Jyotishmati is $300.$ The quantity of material flow is such that the demands at all these locations are exactly met. The capacity of each pipeline is $1000.$
What is the free capacity available in the Avanti-Vidisha pipeline?
- $300$
- $200$
- $100$
- $0$