Complex sentence: In 2010, a thief stole the "Byrd Cage" donation box, probably netting less than $100 but causing about $1,200 worth of damage to the front doors.
Split into simpler sentences: In 2010, a thief stole less than $100 from the "Byrd Cage" donation box. The break-in caused about $1,200 worth of damage to the front doors.