Thanks for the reply although I am a beginner on file maker so i need it in step form..
You've got two parts to design an implement:
- A table to record each inventory change
- A layout and script to process each barcode scan
The link Ninja posted covers item 2. Here are a few more links on the subject:
I realize you're a beginner and these threads may be a bit overwhelming but check them out first and let us know how much you're able to figure out from them and then we'll try to take it from there.