details about retotalling...

hi frnds,please help me...

Actually I have done my Costing & FM Paper in PCC really well.But i have failed and the mark was just unimaginable.i was so upset

so i want to do retotalling.so pls help me to get rid out of my following confusions.

1.what is the procedure for retotalling?

2.when is the last date for it?

3.Has anybody got atleast reasonable mark for their paper after retotalling?

Thanx in advance.