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calculating an option cost



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Hello all:

A basic question here, for testing purposes.  I'm trying to figure out the
cost of a option spread.  Due to the contraction of the CRB (basis CRM9) I
think an at the money call-put spread might be rewarding.  But I'm having
trouble calculating the cost of this spread. 
According to the Quote-Watch option chain, the following CR options cost:
                        bid     ask
Call 192 F99    2.85    2.85
Put 192 F99     2.35    2.35


Now if I multiply the 2.85 by the value of a CR tick (ie. $25) the cost is
71.25. And the Put is 58.75.  This spread would only cost $130 (plus comm.).
That's a bit too good to be true.  

What am I doing wrong?

Thanks,
Joe