Answer:
The realized gain on the sale is $1,800
Step-by-step explanation
Adjusted basis is defined in tax accouting as the residual cost after deducting various related tax items.
Since
Selling Price = $6,000
Adjusted basis = $4,200
Therefore, the gain realized on the sale is
Sales - Adjusted basis
= $6,000 - $4,200
= $1,800