15. At a tool counter, the supply clerk is paid daily wage at Rs 100 per day for an 8-hour working day. The employees who come to him to take and return the tools, their daily charges are Rs 120 per day. On an average, 25 workers come to the counter every hour for replacing the tools. The supply clerk takes, on an average, 2 minutes either for issuing or for replacing the tools. The company is considering a semi automatic device at the tool counter so that the service rate becomes faster. It will involve an additional expenditure of Rs 100 per day besides the clerk. But, at the same time, it will increase the service rate by 33.33 per cent (one-third). Should the company install the semi-automatic device?
(MIB, Delhi, 2008)