Also, if they did indeed sell 1.5m copies at $40 per copy, that's $60m. Even allowing for large amounts of unsold stock that surely can't have been too far off covering costs, and can't have been the only reason for their subsequent $310m loss.
EDIT: Fair points about distributors margins, retailers margins, manufacturing costs etc. But even if they only saw $10m-$20m of the $60m in retails sales, that is still a reasonable amount, and mean their losses on that one game would only be in the millions or low 10s of millions, so there must have been additional reasons for the company's $310m loss.