![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
某商店以固定进价一次性购进一种商品,3月份按一定售价销售,销售额为2400元,为扩大销量,减少库存,4月份在3月份售价基础上打9折销售,结果销售量增加30件,销售额增加840元.求该商店3月份这种商品的售价是多少元()
A.45
B.40
C.35
D.30
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、40
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.45
B.40
C.35
D.30
B、40
请计算:
A.数量售价金额
B.数量进价金额
C.售价金额
D.进价金额
30
56
104
130
408
400
272
192
A.30%
B.40%
C.45.45%
D.50%