Dr.PathRoch said:For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine.
That is right for the common case. Whether it is right for the case being asked about depends on a detail that has not been given.
Found this through search years later and it is still the best discussion of the question, so adding one thing. One practical note: write down what you did and when, before you need it. Reconstructing a timeline from memory three months later is how people end up unable to answer the one question that would have resolved it.
From the other side of the consultation, briefly. Take it one variable at a time. Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent argument can untangle them after the fact.
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Browse GL BiochemVendorMark said:Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent…
There is a second half to this that has not been said yet. Whatever the answer turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, and invite the correction. That is slower than asserting, and it is the only version that survives being wrong.