HELP
 

Hi i am italian
I need help with this
=SE(CONTA.NUMERI(V4;W4);SE(O(W4=0;V4=0);0;ARROTOND A.PER.DIF(MEDIA(U4;SE((W4<"");W4;V4));0));"")

The first part says that "If there is a number in V4 or W4"
The third part says That it has to do an average between U4 and W4 if there
is W4, and if no with V4 (if there aren't W4 nor V4, no has to make an
average)
The second part in bold is the problem
I want If W4 priority is 0, and if there isn't W4, if V4 is 0, so the result
has to be 0
If There is a number in V4, but W4 is 0, the result has to be 0
W4 has to be priority respect then V4
Thanks