Random number in specific range & Total

Friends,
I like to randomly distribute #30 between 15 columns

#30 Should be randomly distributed between the 15 columns
Randome numbers should be generated between 0 to 5
Total must be 30

I use the following command to generate random numbers.
=RANDBETWEEN(0,5)

But how to fix the total to 30.

Please check the attached file.

Thanks