Referring to the attached pic:

A quadrilateral ACQR is inscribed in a circle. Diagonals are drawn to intersect at T such that angle

Both S, P and B are points outside the circle.

AC and RQ are extended to meet at P such that angle

CQ and AR are extended to meet at B such that angle

QC is extended to S, forming triangle SAC where SC = AC

Find the angle ASC.