Updating old Inventory Quantities and Prices while Keeping old history

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Your question is very timely. A new Guide was just posted:

Create and manage inventory items

Inventory items are used to identify, count, and manage physical goods or materials held by a business for sale or production. They are used when entering line items in many transaction forms in Manager. Beyond being the foundation of quantity monitoring, they: Standardize terminology by always referring to a product with identical language Improve accounting accuracy by always posting similar income or expense items to the same accounts Store and apply consistent prices to frequently sold or …

You can change prices without affecting old entries. Only future ones will be affected. See the Updating portion of the Guide near the bottom. Batch operations are covered in this Guide:

Using batch operations on inventory items

You can create, update or delete inventory items by batch. When viewing the Inventory Items tab, you will see three buttons in the bottom-right corner. [image] Once you click the Batch create button, you should firstly download the empty spreadsheet template so you know what columns are required. [image] Once you open the empty spreadsheet template, you can enter the data. [image] Then copy and paste the data from the spreadsheet into Manager. [image] When you click the Next button, you …