So they tell us that she made $3,000 in the first month, and we also see this three here, so that's interesting. Maybe they represent the same thing, we don't know for sure yet. But let's look at this definite integral. The definite integral from one to five of R of T DT. This is the area under this rate curve. R of T is the rate at which Julia makes revenue on a monthly basis. So if you take the area under that rate curve, that's going to give you the net change in revenue from month one to month five, how much that increased.