after i=1: 21000 45000 70000 28000 136500 30000
after i=2: 21000 45000 70000 28000 136500 30000
after i=3: 21000 28000 45000 70000 136500 30000
after i=4: 21000 28000 45000 70000 136500 30000
after i=5: 21000 28000 30000 45000 70000 136500
