Draw a model with 15 parts.

3/5 of the notes are $50, hence it has 9 parts.

2/3 of the remaining notes are $10 notes (15-9=6, the remaining notes have 6 parts).

Hence 2/3 x 6 = 4 parts. $10 notes has 4 parts

There are 7 $5 notes and 3 $2 notes that take up the last 2 parts.

2 parts = 10 notes

1 part = 5 notes.

No of $10 notes = 5×4 =20

Total value of $10 notes = 20x$10 = $200 (ans)

No of $50 notes = 5×9=45

Total value of $50 notes = 45×50 = $2250

Total value of all notes = $2250 + $200 + 7×5 + 3×2 =$2491 (ans)