Which of the following is not among the $13$ competitive factors that determine a particular company's unit sales and market share of branded footwear in a particular geographic region?

Each company's image rating$/$brand reputation and the appeal of the celebrities endorsing the company's footwear brand The company's expenditures on brand advertising and search engine advertising

The average retail price the company is charging for its branded models$/$styles in the Internet Segment and the average wholesale price the company is charging for its branded models$/$styles in the Wholesale Segment

The S$/$Q rating of each company's brand of athletic footwear in that region and the number of models$/$styles comprising the company's product line in that region

The frequency with which a company has price$-$discount sales events $($monthly$,$ quarterly, or just a single annual clearance sale$)$ and the length of the warranty against materials defects that the company offers buyers $(30$ days, $60$ days, $90$ days, $180$ days, $1$ year or $2$ years$)$

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