Excel keeps calculating - no idea why?

[martmass]

Hi all


I have an issue that Excel keeps calculating for a long time.
Not that long, like 15 seconds, but way to long to work fluently with this file.
Also clicking cells and pushing enter after I filled in something seems to go slow.

I really tried to remove lots of things and change formulas and so on but nothing helps.
I'm also working with a similar file already so lots of formulas are based on that file and there it's working perfectly.

Pic 1: Planning where you can fill in an article number and data should appear immediately, the second error is for the amount.
Pic 2: This appears on the production tab.
Pic 3: Tab 'Deliveries in' if somethin' gets delivered (fill in manually).
Pic 4: Result of those tabs together to follow up stocks.

Excel file as well as an attachment.

If somebody would be able to help me I would be really grateful.

Thanks a lot already.