Im doing a 1.5 months euro trip how much mony should i bring to have a chill time?

ill stay in cheap motels and what not but ive heard Europe can be expensive
I backpacked through Europe in 1998 for 6 weeks. Minus the plane fare and Eur-Rail pass, I spent about $2,200. I stayed in hostels and a few cheap hotels. For most meals, I went to the markets and bought cold cuts