Exco have a little over 346mil shares on issue plus 9mil options, so a little over 355mil shares fully diluted.
So on your $310mil valuation, that is 87cps.
I think that the more important calculation is what the market will value Exco at after all is said and done.
I'm sure the market will bid up the share price to "buy the dividend" assuming the deal goes ahead as proposed today, although to what extent will be very interesting.
cheers
EXS Price at posting:
68.5¢ Sentiment: Hold Disclosure: Held