Aproduction possibilities curve shows:

a. that resources are unlimited.
b. that people prefer one of the goods more than the other.
c. the maximum amounts of two goods that can be produced assuming the full use of available resources.
d. combinations of capital and labor necessary to produce specific levels of output.

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?