I can't help out my friend because I am at my job.
Do you have any regrets for not helping.
No, I don't, I need my paycheck for the week.
Making money is important, it's fine to prioritize income. If you don't earn money you can't pay your expenses.
That's the best way to think
Your friend will understand why you cannot help. You don't want to get fired for missing work unecessarily.