How is the total number of API Calls calculated?

The total number of API calls per day is calculated as shown below:
API Calls per Day = Free Limit + (Number of Users × Maximum User Limit per Day) + Booster Pack Limit
For example, in the Professional Edition:

• Free Limit = 6,000
• Maximum User Limit per Day = 600
• Active Users = 2
• Booster Pack = Not available

Using the above-mentioned formula, the total number of calls is calculated as: 6,000 + (2 × 600) = 7,200 API calls per day.
Each user has an individual usage cap, so the total count may vary depending on the number of active users.