3-6
Sue’s monthly earnings consist of a monthly salary and a 4 percent commission on the
portion of her monthly sales that is in excess of $2,000. If Sue’s monthly salary was the
same in July as in August, how much greater were her sales in July than in August?
(1) Sue’s monthly earnings were $3,620 in July and $3,580 in August.
(2) Sue’s monthly salary was $3,500 in July and in August.
sales that is in excess of $2,000. 意思是超过2000的部分拿4%佣金
key:A
mine:c
(1)(2)相减的两个月4%sales的差,再除4%就好了
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