Work / Bar staff - Hourly rate Wroclaw [4]

Hi,
I've looked at various sites attempting to find out wage costs of bar staff and a bar manager in Wroclaw. But I haven't found specific info which is what I need for my business plan.

For instance, I've only found averages, which isn't ideal.
Hospitality sector average in Poland is 3414 PLN per month.

Average wage in Dolnyslask is 4228 PLN per month.
If anyone has more specific info, sources, or links to explore please let me know.

Thanks,
Crafty beer