p1/14%:0.877
p6/14%:0.456
(P6/14%-P3/14%):3.888-2.322=1.567
old:
-40,000*p1/14% 5,000*p6/14% =-32,800
new:
-160,000
30,000*P3/14% =69,660
20,000*(P6/14%-P3/14%)=31340
26,000*p6/14%=11,856
+20,000 =-27144
否,差異5656