In many grocery and drugstore chains, salespeople employed by the vendor that supplies the merchandise straighten stock, set up displays, assess inventory levels, and write orders. These activities highlight which value of personal selling?

These activities highlight saving customers time and simplification of buying.

Explanation: Personal selling can be defined as a method of making sales that involves a seller interacting with a buyer in order to influence the buyer's decision. Personal selling comes with many value added and one is highlighted in the question in which salespeople are involved in the setting of displays, assessing inventory, writing orders etc. This activities for one, will save a customer's time as the sale's person actively know the location of the different products in the store, and also makes buying simple by saving time and also performing some demonstration if required.

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in terms of experimental research, mcdonald’s charging different prices in the two cities relates to