Click on the Inventory module and select the option Rate update
Then click on the option +New Rate Update
Click on the product option and select the product that you want to update rate
After select the product, need to select the option of Ho or Branch, to update the product rate. By clicking on the option, Update To it shows the list of branches, HO and all
Click on the show batch menu to access all the batches of the selected product
Then click on the Sales rate and enter the updated rate of the product
After enter the whole details, click on the Save menu to save new rate update.