When you subscribe for an Annual Committed Plan you might see the number of units abnormally high because the number of records is being calculated for the entire year instead of just one month.
This calculation is performed to keep our records-based billing consistent with our monthly plans.
It might help to explain this visually. Hypothetically, let's say you have 25,000 records starting in January and you add 500 records every month. Let's also say you consistently have 50,000 search requests each month. After multiplying the records by 12, the running totals for the year will look something like this:
Selecting the greater value each month and dividing by 1,000 gives us the total usage, in units:
You can see that it initially starts out very high due to the number of records. However, by the end of the yearly commitment the search request total ends up driving the units total and the search requests only increase slightly (based on the added 500 records per month.)