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Rewrite the series using summation notation. Use 1 as the lower limit of summation.
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Low-Cost Items
Products that are sold at a minimal expense, often targeting budget-conscious consumers.
Convenience Product
Goods that the consumer purchases frequently, immediately, and with minimal comparison and buying effort.
Shopping Product
A type of product that consumers purchase after comparing quality, price, and style from several sellers.
Specialty Product
A product that is characterized by its unique attributes, high level of quality, or brand identity, often leading consumers to put forth a significant effort in purchasing it.
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