Final answer:
A salesperson should use a reaching tool or seek assistance when a step ladder isn't available to safely reach high merchandise, following store policy and not resorting to unsafe methods.
Step-by-step explanation:
When merchandise is on a shelf that is higher than can be reached by foot and a step ladder is not available, a salesperson should prioritize safety and follow store policy. If possible, the salesperson should seek assistance from a colleague or use an appropriate reaching tool or a mechanical device designed for such tasks. It is important not to attempt unsafe methods, such as climbing on shelves or using makeshift items to gain height. Instead, the salesperson should ensure that the correct equipment is brought to the location or ask a colleague who can safely access the merchandise for help.