@Nicole Here in lies the problem--most of the time I walk to work but some mornings I need to take the bus.  I buy and keep a book of tickets in my wallet but sometimes in the mornings on my way to work it's too hard to validate said ticket.  It's easy on an empty bus at 7pm after work but not so easy when you can hardly move your arm to hold on in the bus.  On top of all of this, I have horrible luck and I <em>know </em> that I'll get checked one day on a crowed bus when I've been unable to stamp my ticket.  This will make me mad because I usually have the ticket in my pocket but sometimes I just can't reach the machine to punch the ticket.  I'll be even madder if I get over charged when I have to pay my fine so when I get caught (and I know I'll get caught) I'd like to know how much to expect to pay rather than trying to negotiate this in my questionable Bulgarian.