Exhibit 16-3 presents data pertinent to the decision. Examine these data care-fully. Most of the items are self-explanatory. Item 9 is the annual cost of a data-link service. this service enables Mountainview to participate in a nationwide computer network, which allows cities to exchange information on such issues as crime rates, demographic data, and economic data. Item 10 is the revenue the city will receive from two time-sharing customers. the mountainview city school district and the county legislature each has agreed to pay the city in return for a limited amount of time on the city's computer.