 weighted average. Inventory system using third-party app or integration. So your next your next method would be I'm going to have my Shopify or Amazon store where we're facilitating sales. I'm not going to try to pull all the inventory. I wanted to have a more sophisticated inventory system possibly but I don't want to pull it all into QuickBooks item by item because again it will overload the QuickBooks system especially I have a lot of volume of inventory. So you could then integrate third-party applications which are designed to handle inventory which are usually more sophisticated than QuickBooks in and of itself to handle more sophisticated inventory needs. So this would usually be something that most I believe accountants for e-commerce would be recommending for more higher volume people that are selling on e-commerce like a like an Amazon or a Shopify or something. So we can use third-party integration apps to manage inventory often useful for higher volumes and more complicated inventory needs. So we're not going to go into these in as much detail here because there's going to be more customization. So when you're looking into inventory applications for more complex needs part of the reason that you're doing that is because you have more specialized needs and you're looking for software that is flexible enough to cover those specialized needs so then you can go in a bunch of different directions in terms of what your specific inventory needs are and the proper application to deal with those could vary depending on what your needs are and if you have a higher volume of inventory then it's worth your time of course to do the research and figure out what's the best fit for that situation but some inventory apps you can look at to get an ideas SOS inventory, Zoho inventory, Ecom Dash, Earplane, Locate Inventory, Final, and SIN7 so you can dive into that in more detail if you so choose. We'll work some example problems in the future thinking about a cash-based system and then thinking about the periodic inventory system and we'll talk about flow assumptions like FIFO and weighted average in our practice problems.