example 3 in chapter 27

the question about example 3 in chapter 27 when they say that deferred tax liability is 300*30%=90 and I calculated as 500 less 30 depreciated to revaluation less 20 after revaluation and total is 450, also 800 is depreciated at 34 to 766, then the difference is 316 which is multiplied at 30% with result of deferred tax liability of 94.8
How is right indeed?