Where is the last pound in this Brain Teaser?

the pound that is missing should be in the till in the desk I know it is confussing but it is how you add it up �30 was put in the till only �5 came out so �25 is in the cash box so the bell boy keeps his �2 and the three guys get �1 each ........ hope you get it now .................it is a good brain teaser