Cannot get trigger to work with Drop Correct states of multiple objects

I am designing a slide to allow learners to play around with the formula c = f * lambda (speed of light = freq * wavelength). 

There is a text box "C" that should only go into a rectangle "C Box".

The F and L (short for lambda) are trickier. I want to allow learners to drop a text box "F" into either a rectangle "F Box" or "L Box", and similarly allow them to drop a text box "L" into either a rectangle "F Box" or "L Box". That is because f*lambda or lambda*f should both be allowed.

1. When learners drop the "F" text box into rectangle "F Box", I changed the state of "F Box" to Normal.
2. When learners drop the "L" text box into rectangle "F Box", I changed the state of "F Box" to Drop Correct.
3. When learners drop the "L" text box into rectangle "L Box", I changed the state of "L Box" to Normal.
4. When learners drop the "F" text box into rectangle "L Box", I changed the state of "L Box" to Drop Correct.

Finally, I want to play an audio and also resume timeline when either one of the two conditions below is true:

1. All rectangles have the state Normal
2. Both F Box and L Box have the state Drop Correct and C Box has the state Normal.

However, I am having trouble achieving the correct behavior. 

Please help!