btc24 Thanks for your patience & fair minded attitude, I've decided that using the largest markets for each conversion is the fairest & that would be ltc/btc on btc-e followed by btc/usd on gox to give a melded ltc/usd (via btc) price & there haven't been any objections to this anyway (it was originally what I had in mind to do anyway as I always calculate it like this) so I'm now sending your 100 ltc prize, glad that it's coming at a good time for you & also the ltc price is looking perky atm too in both btc & usd terms.
edit:
http://explorer.litecoin.net/address/LfJUtrxqu7cChehEbxkdMvkWSsF7UpFyMy