The gain of $656,000 will be included in gross income.
Net income = Sale price - Cost = $900,000 - $244,000 = $656,000
As Barney and Beth have lived in the house for 18 months and not stayed their for atleast two years, so they do not meet the two year ownership and use test.
So, all of the gain on the sale will be included in the gross income.
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