a year ago, Dietz foods launched a yearlong advertising campaign for its canned tuna.Last year Dietz sold 12 million cans of tuna compared to the 10 million sold during the previous year, an increase directly attributable to new customers brought in by the campaign.Profits from the additional sales, however, were substantially less than the cost of the advertising campaign.Clearly, therefore, the campaign did nothing to further Dietz economic interests.sale of canned tuna account for a relatively small percentage of Diets profits Most of the peoples who bought Diet canned tuna for the first time as a result of the campaign were already loyal customers of other Dietz
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