Answer:
The whole of the $480,000 gained
Step-by-step explanation:
Barney and Betty are selling their home for $660,000 and the cost incurred is $180,000. Their net profit is 660,000-180,000= $480,000.
However Barney and Beth have lived in the house for 18 months, they have not stated for up to two years, so they do not meet the two year ownership and use test.
All of the gain on the sale will be included as gross income. That is the whole $480,000 gained.