Not sure how your math works, but the actual sales time would only be 5 months. Manufacturing would end before the beging of the next device unless they kept is as a cheaper model.
Yes, they make profit, but the longer a model is manufactured and sold the greater that profit. They have targets for these things and they will not change that just to rollout 2 CDMA iPhones in such a short term.
I honestly don't see the logic here. Why would you guys think Apple would release 2 CDMA iPhones in such a short period? Makes no sense.