The math on PP Steps Rake

[TheNoodleMan]

By my calculations (assuming everyone buys in at level 1) Party Poker rakes a total of $4,545.83 from every full cycle.
Here is my math, any corrections to this are welcomed with open arms.
Starting at the top and working backwards:
level 5: PP rakes $650 ($65 * 10 players)
Level 4: PP rakes $875 ($35 * 10 players * 2.5 Tourneys to fill one level 5)
Level 3: PP rakes $937.50 ($15 * 10 players * 6.25 Tourneys to fill 2.5 level 4's)
Level 2: PP rakes $1041.66 ($5 * 10 players * 20.83 Tourneys to fill 6.25 level 3's)
Level 1: PP rakes $1041.66 ($1 *10 players * 104.16 Tourneys to fill 20.83 level 2's)

I know this is kind of ambitious for a first post and I'm asking to get shot down, but I figured it was about time to quit lurking and start contributing.
If anyone sees anything wrong with my math, please correct it.