Student Exchange Programs

hi! I’m italian and next year MAYBE (but I hope) I’ll spend a year in the usa (exchange student). I just wanna know how much money I need a month for live there…for example about 127$ is enough? or I need at least 254$?

second: how much clothes cost? for example a pair of signed jeans (for example D&G or LEVI’S and a pair of jeans not signed but with a good quality?

third how much the bus subscription cost?

thanks so Much…good bye and good luck!! HAPPY HALLOWEEN
california and washington state for example
if you stay with a host family…your family paid your meals so I need oinly the “survive expenses”