You are welcome.
You can expect to pay on average 32 to 40 korun for beer depending on its strength and how close to tourist attractions you go. Beers etc in Old Town Square can be much more expensive. Coffee will be 35 - 50/55 depending on whether you are ordering espresso or something different such as latte.
Most restaursnts will offer a daily nabidka for a main dish - expect to pay 150 - 200 if you are having soup plus main course plus a drink. Pizza varies widely.
Have a good time in Prague and enjoy your stay