In a bag, the number of $2 notes was 40% more than the number of $5 notes.

When 20% of the $5 notes were taken out, there were 24 less $5 notes than $2 notes in the bag.

(a) Find the number of $5 notes left in the bag.

(b) Calculate the difference in value of the $2 notes and the $5 notes in the bag at first.

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