Sheridan company sells two types of computer hard drives. the sales mix is 30% (q-drive) and 70% (q-drive plus). q-drive has variable costs per unit of $45 and a selling price of $105. q-drive plus has variable costs per unit of $60 and a selling price of $150. the weighted-average unit contribution margin for sheridan

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?