How much was a glass of beer in the Old West?

I'm curious, can you shed some light on the cost of a glass of beer in the Old West? I understand that prices varied greatly depending on location, time period, and other factors, but I'm interested in getting a general sense of what the average price might have been. Was it affordable for the common man, or was it considered a luxury item? Did prices fluctuate significantly over time, or did they remain relatively stable? I'm fascinated by the history of consumption and economics in the Old West, and this question has been lingering in my mind for some time.