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In this post from Weds 26th, your author spoke of how Minefinders had seen about 1.7m ounces of gold "disappear" from its resource/reserve count at Dolores. So yesterday reader "T" (we'll call him) mails in to note, in the nicest possible way because T is a nice person, that your humble scribe is a dumbass on math. Part of the mail exchange included this screenshot that shows your author's math (total 4.44m on the left) versus the reality (on the right).
Yes indeed, somehow or another I managed to miss on adding 800,000 ounces to my total, so in fact MFN at Dolores doesn't have 1.7m oz Au disappeared, but 900,000 oz....not so bad, right?
The exchange with T went on to discuss the relative merits of MFN the company, with both grade and the silver resource featured (T is a smart dude, by the way). But here I'd like to go on a different track and note the error in my calcs was eventually found; i'd trusted the auto-addition feature on Excel without noting a bad input line. In the end it's not a biggie, but it is a cheap-priced, salutary reminder to your humble scribe to check his freakin' work on occasion and not just rush to publish.
IKN thanks T for the feedback and bows deeply to the gods of math. Ain't no arguing with the numbers.