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.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
P=300+0.05(S-1000)
(1)P=0.1S 代入上面式子有解 可求出P
(2)S=5000 也可以求出P
所以 选择D
300/10% 大于1000,所以 the amount of sales 一定大于1000.