HOH2 pot odds question

[jdefoe]

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Middle stages of a major tournament. Sixty players remain and 30 will get paid. Nine players at your table, and you are second to act with a stack of $37,000 and an M of 41. From the TV monitors, you appear to be in the top-10 in chip standings. Blinds are $150/$300 and antes are $50, so the pot to start is $900. You pick up AKo and raise to $1,200, four times the big blind. Everyone folds to the player in the cutoff seat, who has $11,200 and an M of 12.5. He raises to $5,000, leaving him with $6,200 in his stack. The last three players fold around to you. What do you do?

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When harrington contemplates putting the player all in, why does he count your 1200 + his 1200 + plus 900 in the pot to caluclate the odds. Wouldnt you count that 3300, and add the 3800 that he raised? to make it 7100? thanks