REALLY NEED HELP ON THIS ONE!!!!!!!!!

I WILL GIVE BRANLIEST, RATE, AND THANKS

There are 13 flavors at the soda machine, and anyone can choose 6. A sign says we are only allowed to use one of each flavor. You decide to grab a cup and fill it up with your favorite flavors at random (it’s all going to the same place, right?). How many possible soda mixtures can you make? (i.e., don’t leave it in factorial form). show your work