Term used when applying inflation correction to the figures on a balnce sheet, and applies to those accounts that have a nominal value that suffers impairment because inflation, to the contrary...
Net is the final figure after you've taken expenses off. For instance net wages is wages after tax and other deductions. Net interest is after tax is taken off. Net profit is gross profit after...
'In the red' means a negative value or below zero. If you were using the overdraft on your bank account you would be operating 'in the red'. 'In the black' is the opposite to this - above zero.