=IF(AND(H8="YES",J8="YES"),G8+I8,G8)

I think this should work..will you have answers other than YES and blank?

"heater" wrote:

I want to do the following: IF H8="Yes" then the sum in G8, IF H8="Yes" AND
J8="Yes" then G8 + I8. However, if J8 is blank then it only adds G8.