The "Start-up" Business Packages of the Google Drive Toolbox add-on are available for companies up to 50 users. Every Business Package "Start-up" contains 5 user licenses:
1 package = 5 licenses (40 € per user/year)
2 packages = 10 licenses (40 € per user/year)
3 packages = 15 licenses (40 € per user/year)
4 packages = 20 licenses (40 € per user/year)
5 packages = 25 licenses (40 € per user/year)
etc.