关于NETMAN 数学JJ第15题的质疑

sydtsou

15.
In 1995 a company hought 18000 products at $30 each, and sold 8000 of them each at $50, in 1996 they sold the rest of them at $40 each, what is the gross profit in 1995 than 1996 ?
My answerB)6000

这个大家怎么考虑的呢？谢谢大家

groundkeeper

1995:  8000*50-8000*30=16000
1996:  10000*40-10000*30=10000
so......16000-10000=6000