a pet supply company offers a base price reduction for a retail buyer who purchases a prearranged amount of pet merchandise. this deal aids the pet supply company to keep the retail buyer as a repeat customer. which type of discounting strategy did the pet supply company use?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends > a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?