我想请问一下,为什么E选项不对呢?人工成本不考虑吗?OG解释说,换LED的目标是节省年度花费,所以一次性的消费是无关的,为什么呢? -- by 会员 米样 (2011/6/19 13:15:17)
This is simple. So these workers have to spend some time to learn how to convert the fixture. But keep in mind, these workers' salaries have already been guaranteed in the city's budget. So it won't cost the city an extra penny to train them, barring overtime pay. Therefore, E) would not affect the cost to switch the lightbulbs. |