I'm not sure what you think inflation means, but it has nothing to do with whatever it is you think you're calculating. CPI blahblahblah...
Inflation can be measured both in terms of dollars in existence (which he is measuring) and in terms of prices, which the CPI purports to measure. Unfortunately for the American public, CPI is basically a wad of shit and doesn't measure anything meaningful these days. Amongst the absurdities:
A) Geometric weighting is applied so that the items expanding in cost most rapidly are given less weight on the theory that people are likely to use less of those resources in future years
B) Individual items that have gone up dramatically in price are dropped from the basket of goods via substitution. So if prime rib goes up 15% this year they will instead measure hot dogs. (This was part of how the Greeks got into the Eurozone - they flim-flammed the other continentals with dropping lemons from the CPI basket, etc)
C) Pretty much everything they can dream up over at BLS will get hedonically adjusted. An entry level laptop that is $299.99 in year 1 and is $299.99 in year 2 will actually get reported as negative inflation because the new laptop will invariable have some new feature (or even bugfix!) that causes it to have more utility for the same cost. The BLS can say whatever it wants for the adjustment and there is NO PROOF because it is entirely opinion based as to whether or not the new feature set is worth $299.98 or $0.01