How much does a 20cm foil cost from a roll of 500 meters brought for $75?

or:How much does a 20cm foil cost from a roll of 500 meters brought for $75?or:$75 / 500m = 0.15 $/m0.15 $/m * 0.2m = 0.03$ or 3 cent.

or:How much does a 20cm foil cost from a roll of 500 meters brought for $75?

or:$75 / 500m = 0.15 $/m0.15 $/m * 0.2m = 0.03$ or 3 cent.

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