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Shirley had 330 notes in her piggy bank.
30% of them were $100 notes and the rest were $10 notes.
Shirley spent some of the $100 notes.
As a result, 23% of the remaining notes in the piggy bank were $100 notes.
(a) How many $100 notes were spent by Shirley.
(b) What is the total value of the notes which were left in the piggy bank?
Notes to student: