The Herberger Oil & Gas Company explored for and developed oil and gas wells in Texas, Louisiana, and Oklahoma. Presented below are the company’s income statements for a five-year period under the successful efforts method and the full cost method.

Herberger Oil & Gas used the successful efforts method for purposes of preparing its income tax return but the full cost method for purposes of preparing its audited financial statements for its equity investors.

Required 

Assuming an effective tax rate of 30 percent, calculate the deferred income tax effect for Herberger Oil & Gas Company for the five-year period Year 1 through Year 5.

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($ millions) Income Statement Under the Successful Efforts Method Year 1 Year 2 Year 3 Year 4 Year 5 Total Revenues. $40.0 $55.0 $62.5 $110.0 $167.5 $435.0 Less Lifting costs 5.0 7.5 9.0 17.5 28.0 67.0 Exploration costs 21.0 0.0 0.0 0.0 0.0 21.0 Interest expense.. 4.0 4.0 3.0 2.0 1.0 14.0 Depletion expense 2.4 3.6 3.6 6.0 8.4 24.0 Income before tax $ 7.6 $39.9 $46.9 $ 84.5 $130.1 $309.0