A test-marketing of a newly released DVD in a representative Canadian city, with a population of 120,000,

Question:

A test-marketing of a newly released DVD in a representative Canadian city, with a population of 120,000, resulted in sales of 543 units in a three-month period. If the DVD sells at the same rate in the rest of the country, where 21,000,000 Canadians have access to retail outlets, what three- month sales may be forecast for the DVD?

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