The following inventory valuation errors have been discovered for Knox Corporation:
• The 2012 year-end inventory was overstated by $23,000.
• The 2013 year-end inventory was understated by $61,000.
• The 2014 year-end inventory was understated by $17,000.
The reported income before taxes for Knox was:
Year Income before Taxes
2012 $138,000
2013 254,000
2014 168,000

Required:
Compute what income before taxes for 2012, 2013, and 2014 should have been after correcting for the errors.