When you've used Linux for over 20 years, you don't need much hand-holding.

When touching Linux for the first time, many people think like this. "The black screen is scary." "What should I type?" "Can't I just click?" But it's okay. First, I want you to understand that there ...

if qty1 == 0 and qty2 == 0 and qty3 ==0 and qty4 == 0: messagebox.showwarning("No order", "Please!,Place order first... ") ...

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