> For the complete documentation index, see [llms.txt](https://kb.logicerp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kb.logicerp.com/logic-erp-learning-hub-tutorials-and-best-practices/setups/setup-items/setup-items-multiple-pack-sizes/configuration-multiple-packs-sizes/configuration-options-1/default-pur-c.f-sale-c.f-and-rate-c.f..md).
# Default Pur C.F, Sale C.F & Rate C.F.
**YouTube:** [How to Set Default Conversion Factors (C.F) When Creating a New Item?](https://www.youtube.com/watch?v=95V82YPUzz8)
## How to Set Default Conversion Factors (C.F) When Creating a New Item?
In this tutorial, we’ll learn how to set up **default Conversion Factor (CF) options** while creating a new item in Logic ERP.
***
### **Accessing the Option**
* **Navigate to:** Setups/Setup Items and then click on **"Setup Items Multiple Packs/Sizes".**
* In this section, you will find the option labeled as:
* Here, you will find three CF options:
* **Pur CF**
* **Sale CF**
* **Rate CF**
* By default, all three are set to **zero**.
***
### Configure Default CF Values
* Open the **Configuration Settings**.
* Select **Set Default CF**.
* Define default values as per your requirements.
* Example:
* **Purchase CF = 1**
* **Sales CF = 3**
* **Rate CF = 3**
* Save the changes.
***
### Verify During Item Creation
* Create a **new item**.
* You will see that the **Purchase CF, Sales CF, and Rate CF** are now prefilled based on your default configuration.
* Enter the item’s **conversion factor** (e.g., 1 case = 100 units of Item).
***
### Functionality in Transactions
#### Purchase Transaction
* Create a **purchase entry**.
* Press **F5** in the **PACKS column**.
* The system will automatically pick the **case quantity** by default.
* Enter the **item rate** and save the voucher.
#### Sales Transaction
* Move to the **billing screen**.
* Add the same item to the sales transaction.
* The system will automatically pick the **single unit** as per the **Sales CF**.
* The **rate** is calculated **per piece**, based on the defined conversion factor.
***
That’s it! You’ve successfully set up and tested the **default CF options** in Logic ERP. This ensures faster and more accurate entries during both purchase and sales transactions.
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