[Altaru]

I'm really wanting to go on a trip to Japan when I graduate from high school, and it could be anyone from just me alone to two or three of my friends.

I'm just wondering, how much money should I save up? I'm in the last few weeks of my second year right now, so I have a fair amount of time left, I would just like a little advice on how much money, where I should exchange $ for yen (Could anyone teach me how to type that symbol?), among a few other issues.

Could anyone help me?