Hey everyone. I am completely stumped. My customer would like me to come up with a way to calculate the amount of fluid drained from the a tank. I'm stumped on how to write and event frame or other analysis to signify the start of the tank draining and then the end of tank draining and how much volume was in the tank when the draining started and how much volume was left when it ended. I'd love to hear any ideas anyone has. Below is a screen shot of the data. Thanks for your help in advance.