T&M billing of a project, Is it possible to inherit of the "Sales price" of the customer for a line?

@raphrfThank you for your question.  On the billing rule, the Line Amount Formula can include the @Price function.  Here is a link to the help article that describes how to use it.  https://help.acumatica.com/(W(1))/Help?ScreenId=ShowWiki&pageid=d63d6b6c-15ee-4576-bf27-8de69f8f5da6

​@AP13 Here is the Help Article Billing Rules: General Information  Under the Formulas and Parameters in Billing Rules and Allocation Rules,  “For project transactions with associated stock or non-stock items, you can retrieve the effective sales price of an inventory item by using the @Price parameter. For instance, to implement a price model that estimates the project billable amount as the billable quantity of the provided services multiplied by the price, you can use the following formula: =[PMTran.BillableQty]*@Price. For more information about using billing rates, see Billing Rates: General Information.”