某企业的生产车间的用电成本资料如下：生产车间电力具体分为照明用电和设备运转用电两项。对这两项进行观察和技术测定。按照正常生产情况，每天工作8小时，车间照明每小时用电150度，生产产品每件需用电1.5度，企业备用多台设备，目前企业生产能力有剩余，假设全月工作日20天，每度电为1.0元。
要求：
(1)确定企业每月用电的固定成本。
(2)确定每件产品用电的变动成本。
(3)确定车间用电成本直线方程。
(4)若产量为1500件，计算该车间本月总用电成本。
参考答案：(1)每月固定成本=8×150×1.0×20=24000(元)
(2)每件产品的变动成本=1.5×1.0=1.5(元/件)
(3)车间用电成本的直线方程为：y=24000+1.5x
(4)根据车间用电成本的直线方程可得：
本月用电总成本=24000+1.5×1500=26250(元)
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