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

• The 20X1 year-end inventory was overstated by $23,000.

• The 20X2 year-end inventory was understated by $61,000.

• The 20X3 year-end inventory was understated by $17,000.

The reported income before taxes for Knox was:

Year ................... Income before Taxes
20X1 ....................................... $138,000
20X2 ......................................... 254,000
20X3 ......................................... 168,000

Required:

Compute what income before taxes for 20X1, 20X2, and 20X3 should have been after correcting for the errors.