The following inventory valuation errors have been discovered for Knox Corporation:

∙ The 2015 year-end inventory was overstated by $23,000.

∙ The 2016 year-end inventory was understated by $61,000.

∙ The 2017 year-end inventory was understated by $17,000.

The reported income before taxes for Knox was:

Year..................................Income before Taxes

2015...............................................$138,000

2016................................................254,000

2017................................................168,000

Required:

Compute what income before taxes for 2015, 2016, and 2017 should have been after correcting for the errors.