Counting numbers even if there text in the column

I have a document which has the hours for a week (6 dayS) - within those that week PC (personal time) and VT (vacation time) is marked.

Example:

F9: 11
G9: 7.75
H9: 6.75
I9: 7.75
J9:
K9: PC

The total should be 33.25, I'm using a =SUM(F9+G9+H9+I9+J9+K9) and I'm getting #VALUE!.

I know this should be a simple coding - I guess I'm just brain dead today. Any suggestions for my hang-up?