PharmD_Rodriguez said:

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…

Adding the part of the answer the thread has not reached. 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.

That is the short version; the long version is somebody else's post.

The figures, for anyone assembling their own picture. For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine. Half the figures circulating in this community trace back to a secondary summary that dropped a qualifier.

Moderator note: a post naming a supplier has been edited. Discuss suppliers in the review sections, not here. Report rather than reply if it drifts again.

jason_paloalto said:

For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine.

Pushing back on jason_paloalto here. The objection nobody has made: this only works if the measurement is doing what we assume it is doing, and that assumption has not been tested here.

jason_paloalto said:

For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine.

True, with the qualification that this is a self-selected group. The people for whom it did not work post less, and that shapes everything we think we know.