Also Cal Poly SLO uses 9-11th grades for a-g courses and only uses capped weighted UC GPA with 8 semesters of AP/IB classes for the extra Honors points in the calculation taken 10-11th grades.
OOS Honors courses do not count for the extra Honors points in the UC GPA calculation only AP/IB courses taken 10-11th grades.
USC might end up being more affordable than the UC’s since they do offer merit aid, while the UC’s offer little merit aid and no need-based aid for OOS students.