If your store encounters a stock that has wrong purchase price, you can first adjust the stock to 0. Then you can re-add the purchase price at the time of Transfer In.
Here are the steps to adjust the purchase price in your store.
Step 1 : Please click on the Catalog menu , then the Inventory sub-menu.
Step 2 : Select the stock of the product you have wrong purchase price, we will clear the stock by clicking the pen logo as shown below.
Step 3 : Then select Set and enter the amount of stock 0 to empty the stock of that particular product.
Then, please click Save at the top right corner to save your changes.
Step 4 : After that, the product that you have chosen has become 0 stock as shown below.
Step 5 : Then you can do Transfer In to reset the product stock and purchase prices. For details about transfer stock, kindly refer to article Transfer In - Automatic Transfer or Transfer In - Transfer Manual.
Step 6 : After you have successfully transferred in, the product stock and purchase price will be updated according to the stock and purchase price that you have just entered in the transfer in process.