The type of artillery issued to each unit of the German Foot Artillery are posted on my web site for 1914:
To get your total just multiply by the number each regiment has in their table of organization.
This information is from Das Ehrenbuch Foot Artillerie
To get to it without the page link go to www.lovettartillery.com and click onto German Artillery Related then scroll to the bottom of the page for Foot Artillery units by Weapon Type.
Hope this helps
somewhat better resolution