If I sign up for a challenge, how many elite miles will I earn for the following flights?

11/28 - IAD to DFW to LAS on a YUP fare
12/4 - LAS to DFW to IAD on a YUP fare
12/6 - IAD to DFW to LAX on a YUP fare
12/10 - LAX to DFW to IAD to a YUP fare
12/23 - BWI to DFW on a YUP fare
12/26 - DFW to BWI on a YUP fare

Will I exceed minimums for Platinum on the challenge? If I make the challenge, how long will the status be valid?