How to make people unhappy

Went up town and noticed that a shop was selling a particular DVD boxed set thingy (CSI Season 4 - more bodies than you can shake a stick at) for a very good price. In fact half the price of a shop that number one daughter had mentioned to me. So, being the caring parent that I am, I of course bought the thing for us to share. Good plan. Call it a win. Except of course that number one daughter promptly comes back from town and shows me the thing she has just bought (at the higher price of course).

Cue much regret and unhappiness in the House of Miles (tm). Nobody's fault of course, except mine. The current recovery plan is to throw ourselves on the mercy of the shop and try to get our money back. Or vouchers.