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Totals of what, when, for whom and why, even where if you remitt the bill to the wrong address...

Everything on a bill/invoice is important, if it isn't right the recipient won't pay it. The bigger the organisation you are billing, the more important it is to get right.

"But the totals matched" is a whining cop out when your 'customer' discovers you've failed badly.

Not good enough, not by a long way, if your customer was delirious with that as an acceptance test you were lucky that they are incompetent, I would have been much more demanding, being all too well aware of what can, does and quite likely will go wrong.