I can't make sense of this data. For example consider zip code 94947, a town in Marin County CA.

Population 25,183 with median income (B19019_001E) 121,388. So far so good.

Now B19001_001E (total) is 9,204. And this is the sum of the 16 brackets (B19001_002E - B19001_17E). But what does 9,204 represent? The ACS subject definitions (page 88) says "“Total income” is the sum of the amounts reported separately for wage or salary income..." But 9,204 is far too small to represent that total dollar figure. And it doesn't make sense to report dollar figures in income brackets. I suspect that 9,204 might represent the total number of people who reported their income, and each of the other fields is how many people reported income in that bracket. Across all the zip codes I've sampled, this seems reasonable since B19001_001E (total) is roughly 1/3 of the population most of the time. Yet if this is true, then the documentation is either incorrect or misleading. It means B19001_001E is total people who reported income, not the total amounts reported.