You're not taxing the loss. You're reducing the loss by the net effect of the tax that you would have paid on your net income if you had not had the loss to offset the income. So the pre-tax loss is calculated as the proceeds from the sale of $800,000 minus the net value of the discontinued ops:
$5,000,000
-3,000,000
-1,100,000
+500,000
-600,000
+200,000
=net value of $1,000,000.
$800,000 – $1,000,000 = -200,000. This loss essentially saves you $60,000 in tax (200,000*30%), so the net loss is $140,000 (-200,000 loss, plus the tax savings of 60,000).
This is a discontinued operation, not a net operating loss. Discontinued ops are just a portion of the business that are sold off. In this case, the company might have income from operations of $1,000,000 for example, but then have a loss from disc. ops net of tax of $140,000. Overall, the company still has a net gain.
BEC - 90 - 2/04/2016
AUD - 97 - 2/29/2016
FAR - 92 - 4/19/2016
REG - 88 - 5/19/2016
.