Shoutbox

Damn you >.<

[Edit] to put it in another perpesctive:

Originally they had paid £30 for a bill of £30. Now they've paid £27 for a bill of £25, so the manager pocketed the remaining £2. The remaining £3 (not £1, as the £2 should be subtracted from their payment not added) is shared between the customers as they've taken £1 refund each.

So original situation:
HOTEL: £30

New situation:
HOTEL: £25
Manager: £2
Customers: £3

So their payment of £27 includes the manager's slice, and there's £3 "missing" in their wallets.