What are Jake and Elwood raising money for in "The Blues Brothers"?

Sister Mary Stigmata greeted the brothers with a ruler to their heads when they visited their old Catholic home one fateful morning. The news of a $5,000 tax bill threatening their childhood orphanage sparked a musical journey across Illinois featuring James Brown as a revival preacher and Cab Calloway bringing down the house with "Minnie the Moocher." Their fundraising campaign included playing behind chicken wire at Bob's Country Bunker, dodging militant extremists, and staging the most chaotic concert the Palace Hotel Ballroom had ever seen. Thanks to perfect timing and some creative driving, they delivered the cash to the tax assessor's office just before the deadline. The orphanage survived, though the same couldn't be said for the record-breaking number of police cars sacrificed along the way.