Answer:
$400
Explanation:
To calculate the amount of money they need to add to taxable income to calculate the net operating loss (NOL):
= business capital losses - [business capital gains + (nonbusiness income + net nonbusiness capital gains - nonbusiness deductions)]
= $3,000 - [$1,000 + ($13,000 + $600 - $12,000)] = $3,000 - ($1,000 + $1,600) = $3,000 - $2,600 = $400