These are some rough approximations:

• A commercial large-size coffee cup uses: 20-25 grams of ground beans.
• A kilogram of green coffee beans costs approximately:  US$2
• The estimated cost of roasting a kilogram of coffee is: 40 cents 
• A kilogram of green beans once roasted and dried, is reduced to about: 750 grams
• This then produces on average: 30 large cups of brewed coffee
• In coffee price alone, a cup costs approximately: 8 cents

This however does not tell us anything about the cost of producing a cup of coffee for commercial purposes, the actual numbers vary greatly depending on so many variables. We will tackle these estimates in future posts.