Count rows for complete columns

Hello, 

I have an issue. I try to count rows but I don't know how. 

I need to take into account too following stuffs: 

Each row has to filled 3 columns: 

• asset name 
• asset status 
• asset class (yellow columns)

or this 3 columns: 

• name 
• fqdn 
• IP (green columns)

I can only count values if I have complete values at first in columns: asset name, asset status, asset class and if I don't have values in this 3 columns I take into account this 3 columns: name, fqdn, IP. 

For above example result should = 19 rows because at first I count values if 3 columns (asset name, asset status, asset class) are complete and if I have blank values for this 3 columns  (asset name, asset status, asset class) I should count values for 3 complete columns:  name, fqdn, IP and then all add. 

I have no idea how to do this, can you help me?