1230+b+450=3569
1230+b=3569-450
1230+b=3119
b=3119-1230=1889
b=1889
5000-f-250+59=2809
5000-f-250=2809-59
5000-f-250=2750
5000-f=2750+250
5000-f=3000
f=5000-3000=2000
f=2000
c-2003+1007=5794
c-2003=5794-1007
c-2003=4787
c=4787+2003=6790
c=6790
4687+p-7600=709
4687+p=709+7600
4687+p=8309
p=8309-4687=3622
p=3622
