Well, the area of a trapezoid, you could find the average height of the trapezoid, which would be the average of the beginning and the end period. You take that average over there, and this would work for a line like this. If you take that average height and multiply by the change in time, you are going to actually, you are going to figure out, you are going to figure out that area. That's another way of thinking about it, is you're taking the average rate over that interval times the interval, and that's going to give you the total number of gallons. And so we just have to apply that idea over here. We just literally figure out the area under the curve over the entire interval when the water was actually leaking or draining. So essentially the area under the curve between zero minutes and 60 minutes.