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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:

If the question above has parts(e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12