2.4. Calculation of the cost of the service.In order to identify the possible factors in fl uencing the collec - tion and transportation costs of, recyclable glass-waste. An analysis considering the established goal and the de fi ned boundaries of the system, under study and the discussions with. Amarsul yielded the, cost function expressed by Eq. (6). The cost function comprises the labor cost and vehicle operation. Cost including, maintenance. One should stress that the capital cost is of importance but it was not taken into consideration. Since the goal established for the studied case was to optimize an already existing system (with the invest - ments already. Done in the past) rather than to design a new one.
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