First of all, please don't type using the Caps Lock here. There's no need to do a such thing and it makes you look a bit agressive, which I'm sure you aren't. Now, Excel, Word and PowerPoint all belong to Microsoft Office, so there's only one program you need to "get back", and even there, it's just a product key. Do you remember if it was Office (Excel, Word, PowerPoint) 2010 or 2013? If BestBuy installed Microsoft Office independently, it means that even if you do a Factory Reset, you won't get it back since it wasn't part of the original image the manufacturer stored on the Recovery partition and/or discs.
Once thing you could try to do is to use ProduKey by NirSoft, and see if it can find the Office 20xx product key in the Registry. From there, write it down, download the Microsoft Office version you need (I can link you it) and simply reinstall it using the product key.http://www.nirsoft.net/utils/product_cd_key_viewer.html