Jennifer went to the market with 250 notes in her purse.

$50 notes made up 20% of the total number of notes.

The rest of the notes in the purse were $10 notes.

Jennifer used up some $10 notes for buying groceries.

There were now 35% less $10 notes than before.

(a) Find the number of $10 notes that Jennifer used.

(b) Find the total value of all the notes in Jennifer's purse in the end.

Notes to student:

1. 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