For 1C Bitrix, the settings for uploading a product catalog with prices and availability are no different from a regular site update for all CMS this section will describe the features that apply only to 1C Bitrix.
Updating the properties of 1C Bitrix products based on the fields of the base catalog.
For example, how to save in the property "Article" for 1C Bitrix the value from the field of the base catalog "Manufacturer's Article" Elbuz. There are several ways to do this
- Make up a formula
- Map site attributes to base directory fields for the upload template
It is about the second option that will be discussed. You can, without compiling formulas, simply specify for an attribute (property) from which field of the base catalog the value should be taken. To do this, open the upload template settings in the Elbuz Tunnel format 
Open advanced options 
If the list of available parameters is empty, then download it from the site by clicking on this button 
Specify the base catalog field to be uploaded to the 1C Bitrix product property 
You can take the name of the field from the base catalog grid setup subsystem 
Updating the prices of 1C Bitrix products based on the fields of the base catalog.
For example, how to save in the price field "Wholesale supplier price" for 1C Bitrix the value from the base catalog field "Price cost" of Elbuz.
To do this, in the list, find the field with the price you need (downloaded from the 1C Bitrix website) and indicate the field of the Elbuz base catalog, which must be uploaded to the price of the 1C Bitrix product. 
This example also shows how to multiply the price by the exchange rate. It is also possible to specify other logical and mathematical conditions in this field, it all depends on your task.
