No matter what the 100 liters of mystery fluid are worth, if the pump is running continually, the billing for that day would only be off by .0011574%, so either

No matter what the 100 liters of mystery fluid are worth, if the pump is running continually, the billing for that day would only be off by .0011574%, so either side can probably afford to absorb the loss. Though if it's valuable enough it could of course be "worth" paying top dollar to have engineers solve a ludicrous non-issue.