Help with calculating Permutations

Hi wise mathematicians,

I need some help with calculating the number of possible variations/ permutations of a project that I am working on. I am an experimental film-maker who has made a "Multivariant Movie". This movie runs off a computer and plays through a different variation of the movie everytime that it is watched.

My mathematical abilities are very limited to say the least, I was hoping that some kind and mathematically inclined souls could help me to work out exactly how many permutations/ variations are possible in my movie.

I've included an illustration of the film's structure here.

The film has 6 scenes in total, and there are a number of possible alternatives for each particular scene (ie. Variants A to D)

Thanks for your help in advance!
~multivariant