So the first thing we can do is try to solve for C. We're told in the problem, we're told in the problem that W of zero is equal to, W of zero is equal to 1,400 tons. They told us that that's one of our initial conditions. So we know that the natural log, that when t is equal to zero, W is equal to 1,400. So 1,400, W is equal to 1,400, when t is equal to zero, is equal to zero plus C. Or another way to think about it is, the natural log of the absolute value of 1,100 is equal to C. And obviously this is a positive value, so we can just say that C is equal to the natural log of 1,100. We can drop the absolute value signs, because the absolute value of 1,100 is 1,100. So now we can rewrite this part right over here. Let me do it in yellow, let me start, that's not yellow, let me start right over here.