Auto-adjusting Stock when Selling an Item and auto-fill values related to that item

Hi Guys,

First time writing a post here, first of all let me say sorry in advance for my rudimental English.

I run a very small business, online retail shop.

All my database is done on excel and i'm trying to improve it to make it more reliable and easy to use.

What i'm looking for it's a solution to the following problems:

Every time i sell an item i copy/past from inventory Sheet the data related to that item: EAN,ITEM,Selling Price,Shipping Costs and Profit.

The solution i'm looking here would be for example define and link all this cells(EAN,ITEM,Selling Price,Shipping Costs and Profit) to the EAN code, so every time i want to add a new order to my database i would just need to paste the EAN(A12122 in the example) in the first cell(A4) and the cells F3 to I3 would be automatically filled with the linked data to the EAN Code(A12122).

I tried with the "define name" tools, selecting the data ITEM,Selling Price,Shipping Costs and Profit and naming it A12122, then tried to paste in other cell =A12122 but didn't succeed.

Thank you guys in advance for help, i'll upload a very simple example.