{=AVERAGE(IF(Prov!$A$2:$A$2978=$A2,Prov!$R$2:$R$29 78))}

Above is a formula that succesfully averages what I want. However
sometime the Prov!range r2:R2978 contains zeros.

How can I eliminate those zeros from the average?

The first part of the formula with the cell reference is looking up and
match a name before performin the average..

TIA

Tom