You're managing the same project cited in question $34$ using the earned value technique $($EVT$)$ for cost management. The project planned value $($PV$)$ is $$200,000.$ The project earned value $($EV$)$ is $$100,000.$ The actual value $($AV$)$ is $$150,000.$ What is the schedule variance $($SV$)$ for the project?