Model Processing Time (minutes/unit) Machine 1 Machine 2 Machine 3 Machine 4 E-1000 (E) 20 30 30 10 S-2000 (S) 20 20 20 20 P-2000 (P) 10 10 20 20 30 20 N-1000 (N) 10 10 10 10 OP, E, S, N N, S, E, P O S, N, E, P O E, S, P. N 20 Burdell Industries makes four different models of computer printers: the E-1000, the S-2000, the P-2000 and the N-1000. The E-1000 sells for $200 and has $40 in parts; the S-2000 sells for $150 and requires $30 in parts; the P-2000 sells for $100 and has $20 in parts; and the N-1000 sells for $75 but requires only $10 of parts. The manufacture of each printer requires four stations, Stations #1, 2, 3 and 4. Each of the stations is available for 140 hours a month and there is no setup time required when shifting from the production of one product to any other. The processing requirements to make one unit of each product are shown in the table. Monthly product demand for the next planning period has been forecasted at 100 for each type of printer. Using the bottleneck method, what sequence should products be scheduled?