Table:
text: 2008 Washington Redskins season
Defense
Defense
Player Tackles Asst_ TotalTK Sack Yards FumR
Ethan Albright 1 0 1 0.0 0 0
Jason Campbell 1 0 1 0.0 0 0
Chris Cooley 1 0 1 0.0 0 0
Chris Samuels 1 0 1 0.0 0 0
Stephon Heyer 1 0 1 0.0 0 0

text: 2008 Washington Redskins season
Defense
Defense
Player Tackles Asst_ TotalTK Sack Yards FumR
Rock Cartwright 6 3 9 0.0 0 0
Alfred Fincher 4 2 6 0.0 0 0
Justin Tryon 4 0 4 0.0 0 0
Shaun Suisham 3 0 3 0.0 0 0
Devin Thomas 3 3 6 0.0 0 0
Clinton Portis 3 0 3 0.0 0 0
Todd Yoder 2 1 3 0.0 0 0
Antwaan Randle El 2 0 2 0.0 0 0
Santana Moss 2 0 2 0.0 0 0
Ryan Boschetti 2 0 2 0.0 0 0
Rob Jackson 1 0 1 0.0 0 0
Casey Rabach 1 0 1 0.0 0 0
Ladell Betts 1 0 1 0.0 0 0

Question: What is the total sack for the Washington Redskins 2008 defense if totaltk is 1 and asst. is more than 0 ?