Cost competition: LED sell the most expensive lowest total cost

Three lights competition

cost

Incandescent

1, product power: 40 watts

2, service life: 1000 hours

3, the number of requirements: 30

4, product price: 1.8 yuan /

5, purchase cost: 1.8 x 30=54 (yuan)

6, the consumption of electricity: 40 x 30000/1000=1200 (KWH)

7, unit price: 0.5224 yuan / degree

8, the use of electricity: 0.5224 x 1200=626.88 (yuan)

Total cost of lighting 30 thousand hours: 54+626.88=680.88 (yuan)

Energy saving light

1, product power: 5 watts

2, service life: 3000 hours

3, the number of requirements: 10

4, product price: 12 yuan /

5, purchase cost: 12 x 10=120 (yuan)

6, the consumption of electricity: 5 x 30000/1000=150 (KWH)

7, unit price: 0.5224 yuan / degree

8, the use of electricity: 0.5224 x 150=78.36 (yuan)

Total cost of lighting 30 thousand hours: 120+78.36=198.36 (yuan)

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