# Rate Per **YouTube:** [How to Configure Rates Based on Quantity or Weight in Purchase ?](https://www.youtube.com/watch?v=CDaFjfHr-oQ) ## How to Configure Rates Based on Quantity or Weight in Purchase?  In this tutorial, we’ll guide you through the **“Rate Per”** option in **Logic ERP**, which allows you to define the unit of measurement for rate calculation in purchase transactions. *** ### Enable “Rate Per” Option in Configuration * Navigate to the **Purchase Voucher Configuration**. * Navigate to **Other Settings – 3**. * Locate the option **“Rate Per”**. * Select the **desired unit of measurement** (e.g., Unit, KG, Grm etc) from the dropdown list. * Click **Save** to apply the configuration.

As mentioned above, follow the given steps and select the appropriate option from the dropdown as per your requirement.

*** ### Apply “Rate Per” in Purchase * Navigate to the Purchase and create a new Purchase Voucher. * Select or create the item for which you’ve set the “Rate Per” unit. * Example: * The item **Chana Dal** is supplied in **bags**. * The total number of **bags received is 1**. * The system **automatically calculates the weight** (in KG) based on predefined conversion factors.

As you can see in the picture, the weight here is picked as 30 based on the weight defined in the Item Master.

*** ### Observe Column Behavior * The **“Rate Per”** column now displays the unit selected during configuration (e.g., **KG**). * This value is editable, allowing flexibility to modify the unit directly in the bill if needed.

As mentioned above, you can also edit the "Rate Per In" during the billing process.

*** ### Rate Calculation Based on Unit * Key pricing fields such as: * **Basic Rate** * **Purchase Price** * **Sale Price** * **MRP** — are calculated based on the selected **unit of measurement**. * Complete and **save the transaction** after verifying the rate per unit. *** ### Stock Evaluation * Navigate to the **Stock Report** section. * Select the item (e.g., Chana Dal) and generate the report. * **Observation**: * The stock is displayed in both **Bags** and **Kilograms**, * Allowing for **accurate inventory tracking and reporting**.

The stock is shown in both Bags and Kilograms, enabling accurate inventory tracking and clear reporting of item quantities.

*** ### Summary of Benefits * Define item rates based on **practical units** (e.g., Unit, KG, Grm etc). * Improve **accuracy** in rate application and **stock visibility**. * Enable flexible billing by allowing changes directly on the transaction screen.