Thank you for the opportunity to help you with your question!
He should include the cost of the current point of sale system as part of the cost of the new point of sale system.
In order to come up the right decision of purchasing the new POS system the company must recognize the cost of the old POS system for capital recognition. The company must evaluate the current value of the old POS, while considering the new one. They should make it sure that the price of the New POS system and all the benefits it incur will be much greater than the old POS. In the instance of improving the speed of the taking orders and all the administrative works, it can probably decrease the salary expenses in the company. And also it will incur more sales because of the faster turn - over of orders in the Cafe. The company must organized this benefits and coordinate it with the companies goal and over all strategies.
Please let me know if you need any clarification. I'm always happy to answer your questions.