Which story represents the graph below? The cost of milk rises, until it hits a steady cost. Then it goes on sale, before a sharp increase in cost.
The cost of gas rises, and then doesn't change for while. The cost falls before finishing with a sharp increase.
both of the above
neither of the above

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than 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?