I’ll be in Frankfurt for 3.5 days and I am not planning on doing lots of shopping. I’ll be staying with a friend so I won’t need much for food and lodging. Will $100 US be enough? I do have an ATM and Visa to fall back on too.
Is $200US enough for 3 days in Paris (not including hotel) for food, museums, and transport (eating cheap).

Also, is Amsterdam relativel inexpensive?