are you sure ?
it seems too much, for GS AO winner got 200...
may be 75?
Read closely as to how the point work:
For the race (which is ATP), David gained 35 points. For the rankings (which is ITF), he earned 175. The winner of AO got 200 race points and 1000 ranking points. In the context of canas's question, we will stick to rankings only.
And here's the difference between the two:
The race points determine his qualification for Shanghai; the ranking points determine entry and seedings at the tour stops. In the rankings, which is the most important, David is #8.