Okay, let's use this case study to supercharge you at Excel. So we're told a training course is due to take place for which the cost is unknown. You have been asked to produce a budget by your boss. The desired outputs from the budgets are the total cost and the cost per participant. Lay out the budget in an easy to understand manner, it is important that colleagues should be able to understand and use the model without your help. So that's what we want to do. We want to show you how to lay out this model, put all the data in it so it's really easy to A do, and to B to be understood by your colleagues. We've been given lots of assumptions. We've got assumptions on the number of rooms, assumptions for number of participants. We've then got various different costs. There's a course leader and a teaching assistant. We've got costs for the venue, training room, internet access, and coffee. And then we're told that there are also costs for hotels and food as well. Unfortunately, our boss has provided all of this to us in an email, and I've copied it here into Excel, and it's really of little use to us in its current form. So we've started the model for you, but it looks kind of ugly at the moment. All the words are overlapping the columns, and we need to put the numbers in here, then do some calculations. And what we really want to show you is how to do this quickly, efficiently, and give you some basic rules so that you could go and apply this for a completely different model, a completely different budget, even much more complex items in the future. Now, this file that I'm looking at is available on the page for you to download and open up yourself as you go through each recording. There'll be new Excel files in there, but it's basically this file that gradually builds up. So start with this file, watch the other recordings, make the changes as they go, and you won't have to open up any of the other Excel files unless you get stuck and you want to have a look at the answer file. So stick with this file, build your own budget, and follow along with us.