For each of the following cost items (1 through 11), choose the graph (a through l) that best represents it.

The cost of utilities at a university. For low student enrollments, utility costs increase with enroll- ment, but at a decreasing rate. For large student enrollments, utility costs increase at an increasing rate.

The cost of on-line back-up storage at a rate of $2.50 per gigabyte, up to 50 gigabytes, beyond which storage is unlimited.

The cost of outsourcing diagnostic blood testing by a hospital. The hospital pays an independent lab a fee of $1,000 per month plus $3 for each test done.

The salary costs of the shift supervisors at a truck depot. Each shift is eight hours. The depot oper- ates with one, two, or three shifts at various times of the year.

The salaries of the security personnel at a factory. The security guards are on duty around the clock.

The wages of table-service personnel in a restaurant. The employees are part-time workers, who can be called upon for as little as two hours at a time.

The cost of electricity during peak-demand periods is based on the following schedule.

Up to 10,000 kilowatt-hours (kWh) .........................................	$.09 per kWh
Above 10,000 kilowatt-hours .................................................	$.12 per kWh

The price schedule is designed to discourage overuse of electricity during periods of peak demand.

The cost of sheet metal used to manufacture automobiles.

The cost of chartering a private airplane. The cost is $410 per hour for the first three hours of a

flight. Then the charge drops to $305 per hour.

Under a licensing agreement with a South American import/export company, your firm has begun shipping machine tools to several countries. The terms of the agreement call for an annual licensing fee of $95,000 to be paid to the South American import company if total exports are under $4,500,000. For sales in excess of $4,500,000, an additional licensing fee of 9 percent of sales is due.

Your winery exports wine to several Pacific Rim countries. In one nation, you must pay a tariff for every case of wine brought into the country. The tariff schedule is the following:

0 to 6,000 cases per year ............................................................$11 per case

6,001 to 12,000 cases per year ................................................... $14 poer case

Above 12,000 cases per year ....................................................... $19 per case