# Overwrite Lot No.'s/Rates
**YouTube:** [How to Overwrite Lot Numbers / Batch Numbers and Rates?](https://youtu.be/V-Ae0lX7GGE)
## How to Overwrite Lot Numbers / Batch Numbers and Rates?
In this tutorial, we will learn how to **override lot numbers and modify lot-wise item rates in Logic ERP** and how to track rate changes using system reports.
***
### Opening the Overwrite Lot Number / Rate Utility
* Navigate to the **Inventory Module** from the main menu
* Open **Overwrite Lot No.'s/Rates.**
***
### Selecting Item and Lot for Modification
* Select the required **Item Name**
* Choose the corresponding **Lot / Batch Number**
* Click **Refresh** to load the current rate details
***
### Understanding Default Rate Behavior in Sales Billing
Before making any changes, let’s review how rates work by default:
* Open the **Sales Bill** window
* Transact an item normally
* The system applies the **existing lot-wise rate by default**
***Note:***\
You can manually edit the rate in the sales bill by pressing **F5** on the **Lot / Batch** column.\
However, editing each lot individually can be time-consuming.
***
### Overwrite Lot Numbers and Rates Using Utility
To simplify bulk rate changes:
* Navigate to **Overwrite Lot No.'s/Rates**
* Enter the **new rate** against the selected lot
* Modify rates **item by item** as required
The rate defined here will be **automatically picked** in the sales bill whenever that lot is selected.
**Overriding Rates for All Items at Once**
* Press **F3** in the rate column
* Enter the new rate
* The system will **overwrite rates for all listed items**
* Click **Save** to apply the changes
**Note:** If the F3 shortcut is not working, enable the “Overwrite Rate for All Items” option from the Configuration menu at the top.
***
### Verifying Updated Rates in Sales Bill
* Return to the **Sales Bill** window
* Create a **New Transaction**
* Select the item and lot
***Result:***\
The **updated batch number and overridden rate** are automatically applied.
***
### Tracking Lot Rate Change History
To review both old and new rate values:
* Go to the **Menu Bar**
* Navigate to **Reports/Queries**
* Click on **Item Reports**
* Open **Item Wise Rate Change History Report**
* Select the required **Item(s)**
* Generate the report
**The report clearly displays:**
* Old Sale Rate
* New Sale Rate
* Old MRP
* Updated MRP
***
### Conclusion
This completes the **Override Lot Number and Rate process in Logic ERP**, enabling quick and efficient lot-wise rate management along with complete rate change traceability.
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