How much does a contract cost for an iPhone?

I was looking on Google and it said "$199 (with contract)" & just wanna make sure this is right or do you have to pay extra for the contract and if so how much? Please!

Added (1). I want the iPhone 5

Added (2). How much does it cost a month?

Added (3). 16 GB - Verizon

My iPhone 4S only cost $99.99 with the contract + the case!

It depends what iPhone you are going to get. Either the iPhone 4/4S or the iPhone 5 and which carrier you are going with.

You also have to check all the carriers plans to see which one fits in your budget. Usually you can get the iPhone 4/4S much cheaper than the iPhone 5.

Which iPhone?
Which carrier?
Which plan?

I have Verizon & my roommate & I split unlimited talk, text & 1gb of data I got a free IPhone 4S (I had a 4 and was able to upgrade) and she only paid for her S3 we pay around $75-$90 a PIECE each month. Our cell is usually $135-150 depending on data usage.