Answer : In order to pull the report that includes the marked up and non marked up price you would need to apply the markup at the product pricing level.
Navigate to Admin>Site>Site Name>Settings>Catalog>Products>Pricing Tab>Scroll down to see the Markup section.
Add the quantity ranges along with the associated markup value for those specific ranges.
Once you assign the markup at product level, you can create an Order Item Level Summary report that includes two columns Price and Non Markup Price.
- Non Markup Price column - Item Price before markup
- Price column - This is the actual marked up price
This is how it will display in your Billing reports such that you can differentiate between the markup & non markup price for an item in the order.