When A star ends, it returns a path, p, with estimated cost, c.

There's a variable cost which is, each widget, they might have used some amount of metal and some amount of energy to produce it and some amount of paint if it's a painted widget.

If that's the case, I can propagate back the value.

We have a 3 dimensional state space.

As usual, here are plots of the hypothesis function and of my cost function J.

OK, so how much is the cost per day?

Check here if you think it's guaranteed to do that.

I think that's 10 shares. Well that's my intention.

If h is optimistic, then the estimated cost is less than the true cost, so the path p must have a cost that's less than the true cost of any of the paths on the front tier.

That's the variable cost.

Now we have none of those, OK?

These are these, right here.

So it's equal to 750 plus 250 per hour so plus 250 times the number of hours.

So one of the interesting equations for every startup is that

That was the customer acquisition cost, CAC, here.

Here's the cost function that we wrote down in the previous video.

Seems intuitively obvious but what you want to make sure is the amount of money you're collecting over here is bigger than the customer acquisition cost to remember the amount of money you're spending from here to here.

It turns out that c is also the actual cost, because at the goal the h component is 0, and so the path cost is the total cost as estimated by the function.

As Bergstrom and McAfee describe in a really fantastic little bit of work, if you compare the cost per page of for profit publishers and the cost per page of not for profit publishers in these different fields of science, it's a 4 and a half times factor difference cost per page.

My new value is the value of this future grid cell plus the cost per step, which happens to be 1.

It's much like on a jet.

Suppose we found this path through the state's base to a state x and we're trying to give a measure to the value of this path.

less than or equal to 2,500.

So you've got the wrong people trying to do the cleanup.

We do this by minimizing the cost function.

Some use 3 years, some use 5 that's a question that you and your investors will discuss.

linear algebra, you might know that there exists a solution for numerically solving for the minimum of the cost function

View planned and actual cost

Since it's the sum of the costs that's important.

When they pay you the 400, it goes from accounts receivable to cash.

Gmail, Calendar, Docs, and Sites make up the core of the

In customer relationships all the get keep grow metrics, some of which we talked about, some of which you'll discover, what were the customer acquistion costs?

Scrolling down further, if we arrived at a valid grid cell in that it's still inside the grid and it's not an obstacle, then like before we add to the value the value of this new grid cell plus the cost of the corresponding action.

Ignore for now the names of these actions. I will use them later.

So each portion of this channel is adding higher and higher value.

It won't change the less than sign.

Costs

Cost

Cost

But this is not going to work.

Same with cheapest first.

Actual effort

Actual cost

Actual Effort

Actual Cost