Get total count of activities with REST API
I need to know the total number of activities in a specific date range but I can't find out how to do it with REST API.
What I thought is to query for every activity type and take the last activity id. But, I don't sure that this id number will be the real number of activities.
Do you have any better suggestions?
Bonus question - I can't find how much it costs to upgrade the 10,000 API calls limit and to what new limit it will upgraded to. Where can I find this information?