Historical clue formulations

• Foreign exchange fee — 2014-04-22
• Charge for currency exchange — 2013-09-24
• Currency exchange premium — 2012-09-13
• Currency exchange premium — 2010-03-28
• Money-changer's profit — 2009-03-07
• Currency transaction fee — 2003-11-23
• Exchange premium — 2003-03-01
• Money exchange fee — 2000-04-30
• Money-changer's cut — 1996-01-04
• Money-changer's profit — 1995-11-12
• Exchange premium — 1995-04-11
• Money-changer's profit — 1994-11-27
• Exchange premium — 1994-08-19
• Currency premium — 1994-04-20
• Foreign-exchange cost — 1994-03-04
• Exchange premium — 1994-01-27