某百货公司两种商品的有关销售数据如下 :
要求: (1) 计算两种商品的加权价格指数及由于价格变动而增加的销售额;
(2) 计算两种商品的加权销售量指数及由于销售量变动而增加的销售额.
[些出公式,计算过程,指数百分比保留2位小数]
Goods are carried by several of transport--on road or rail, by sea or air.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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