How many mixed cat breeds are there?

i got to say 300 breeds have been discovered but there is going to be more cat breed discovered that are mixes and new mother cats they can be mixed up with another breed hope i could help and the cat have over 100 vocal sounds i love cats and the most popular breed is the tabby and the next breed after that is the Siamese these are the two top breeds in America i went to ask.com they lied to me they said that ther were 41 breeds of cat but that was in 2005 it is 2011 they have added sevral breeds since then