=12000-4000=8000-4000=4000+40000=44000-4000=40000+2000=42000-2000=40000-2000=38000-4000=34000+2000=36000-4000=32000-4000=28000
7017k
=12000-4000=8000-4000=4000+40000=44000-4000=40000+2000=42000-2000=40000-2000=38000-4000=34000+2000=36000-4000=32000-4000=28000
7017k