gwd-3 Q29

bocaibear

翻了好久以前的解答题帖子没翻到，只好自己发帖求助了
Q29:
Each week a certain salesman is made a fixed amount equal to $300 plus a commission equal to 5 percent of the amount of these sales that week over $1,000.  What is the total amount the salesman was paid last week?
(1)        The total amount the salesman was paid last week is equal to 10 percent of the amount of these sales last week.
(2)          The salesman’s sales last week total $5,000.
       
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
答案是D
求哪位帮我解答一下，我这道题不知怎么的就是觉得看不懂

FIONA-J

每周售货员要付两个成本，一个是固定成本300刀，另一个是若是售货总销额超过1000刀的话，还要多付收获总量的5%成本费。问上周他付了多少？
1，上周他付的总数是上周他总销额的10%
2，上周总销额是5000刀。
解：设总销额为A，则
1，若A<1000,则300=A*10%，则A=3000>1000，不成立
     若A>1000,则300+A*5%=A*10%,则A=6000>1000,成立
2，显然A>1000,则300+A*5%=5000,可求得A

故答案为D

FIONA-J

忘了说了再根据总销额求出上周付的总费，就可以了。不知道说的够清楚不，反正上次考到了类似的，只是把销售换成了电话费，分固定费和浮动费，浮动费还分长途短途两种费。楼主看到这种题小心。