A company will invest in a packaging machine for store-cut meat. It is expected to reduce the cost of the manual charcuterie counter. An offer has been received from a manufacturer. The packaging machine costs $ 170,000 to purchase. Training two employees to handle this costs $ 10,000. When the machine is put into use, the store can save a quarter of a service in the charcuterie. The salary cost for a full-time employee in the charcuterie is $ 300,000. As a rule, the store has to pay for investments in a maximum of three years. a) How long does it take for this machine to pay off? b) Should the company invest in this machine? What speaks for, what speaks against?