Check my math for this site bet!

[skitzo444]

The Philadelphia Park Casino has Royal Match 21. An electronic blackjack table.The player and dealer each have their own 6 deck shoe that is shuffled after every hand.

They offer a side bet in multiples of $5 for the suits and the payout is determined after the next hand is dealt.

1000-1 is both dealer and player have KQ of the same suit
(i.e. dealer= K[img]/images/graemlins/club.gif[/img]Q[img]/images/graemlins/club.gif[/img] AND player=K[img]/images/graemlins/club.gif[/img]Q[img]/images/graemlins/club.gif[/img])

25-1 if the player has KQ of the same suit (i.e. K[img]/images/graemlins/heart.gif[/img]Q[img]/images/graemlins/heart.gif[/img])

2.5-1 if both players hole cards are the same suit.

I was trying to figure out the house edge on this bet.
Please check the math for the following.

(78/312)*(77/311) = .06

For Royal match K[img]/images/graemlins/heart.gif[/img]Q[img]/images/graemlins/heart.gif[/img]

(48/312)*(6/311) = .003

For royal match for player and dealer

.003*.003 = .000009

Then for the final expected return

(.06 * 2.5) + (.003 * 25) + (.000009 * 1000) + (.936 * -1) = -.702

By my calculations the house edge for this site bet is 70.2%.

Could a math wiz please check my math.