iOS upgrade price question

Hey everyone, Quick question here.

If i buy the iOS stardard for $400(US) and decide to upgrade, do I only pay the difference of $1,100? or is it more than that? (meaning, are they trying to make an incentive out of buying iOS PRO straight way, because it's $1,500 for that, but (let's say) 1,600 if you buy the standard, then upgrade)

thanks!!!

You pay only the price difference when upgrading, nothing extra.

You will pay $2600. If you have already paid $400 for unity iPhone you will need to buy UnityPro and Unity iPhone Pro, $1500 each - $400 for iPhone Basic = $2600

Yea man that is a chunk of change.