Advertising expense directly effects the sales of the business. As the campaign is made store-wide sales and it does not directly traceable to any specific department. It need proper basis for allocation of expenses. The proportion of sales of each department is the most suitable basis from all of the given options because the share of benefit from the campaign is received in the form of sale. A campaign might mostly effects the sales.
The group of people for which a product is designed and aimed to is the product's target market. In this case, Topik is a product that aims to sell to blue-collar workers who earn less than $30,000 per year, are divorced, and who like to think of themselves as weekend athletes, which is the product's target market.