# The Maths of eCommerce

- [Markups and Margins](/the-maths-of-ecommerce/markups-and-margins.md)
- [VAT Rounding](/the-maths-of-ecommerce/vat-rounding.md)
- [Stock Ordering Maths](/the-maths-of-ecommerce/stock-ordering-maths.md): OK, that’s a bit of a lie - it’s not really “simple” but it isn’t that “hard”. Leave your fear of stats at the door and step in - maths lurks here!