Hi Sharu
If I consider Screen of CO Doc you provided in your earlier post then Act qty confirmed is .482 Hrs and act rate is .01 per act hrs. Calcualation comes .482x.01= .00482. The value is going in 3rd decimal place hence value you can see in order is ZERO.
For many line items I can only guess that some one has tried confirmations many times. You can verify this with the help of your PP fellow.
Regards
Rajneesh