Can you please run through this step by step with explanations as to why the ANSWER IS net deferred tax benefit of $$6,735.$

Robinson Company had a net deferred tax liability of $$34,476$ at the beginning of the year, representing a net taxable temporary difference of $$101,400($taxed at $34$ percent$).$ During the year, Robinson reported pretax book income of $$401,400.$ Included in the computation were favorable temporary differences of $$51,400$ and unfavorable temporary differences of $$20,700.$ During the year, Congress reduced the corporate tax rate to $21$ percent. Robinson's deferred income tax expense or benefit for the current year would be what?