Level 99 will put all your farming skills to the test!
You are only given 4 Apples and in order to beat this level, you'll need to create matches that multiply values before you collect them.
Every time you create a combination next to the Apples their value will increase and therefore help you to achieve the final target.
Here is a YouTube video showing how a fellow player managed the challenge:
Once you find the right strategy I'm sure you'll breeze through this level.