My idea:
1. 300 good reports - notebook and 1 pencil (pen/stylus)
http://i103.fastpic.ru/big/2018/0808/ec/fe081b98dfab9f81d946dc8938addbec.jpg

2. 1000 good reports - notebook and 2 pencil (pen/stylus)
http://i100.fastpic.ru/big/2018/0808/b8/a6a5e9a3c6f828ca8cc7465871a09bb8.jpg

3. 5000 good reports - notebook and 3 pencil (pen/stylus)
http://i103.fastpic.ru/big/2018/0808/04/83abfc9ac348cb3de48c9bbfbd7dc504.jpg