Two traffic signal systems are being considered for an intersection. One system costs $33,000 for installation and has an efficiency rating of 81%, requires 26 kW power (output), incurs a user cost of $0.24 per vehicle, and has a life of 10 years. A second system costs $43,000 to install, has an efficiency rating of 92%, requires 36 kW power (output), has a user cost of $0.21 per vehicle, and has a life of 18 years. Annual maintenance costs are $75 and $110, respectively. MARR=8% per year. How many vehicles must use the intersection to justify the second system when electricity costs $0.07/kWh? Assume salvage value for each system equals zero. Project the difference in the user cost as savings for the second system. There are approximately 8,760 hours/year. At least how many vehicles per day must use the intersection to justify the second system? (Round up to the nearest whole number.)

| 1 10-6240 0261 51 9 7 6 4 4 3 2 2 110 1000000000000000000 95|3101 0 0261 3222 0-0 0 0 0 OG -1 0 0 0 0-0 0 0 0 0-0 0 0 0 0-0 0 0 0 25-469 5-527 FvP_9 7 5 3 9 6 2 7 2 715925813 3 0123345566-7 7 7 888999 2 8 0258-39 1234578 644 024 6 8 1 47-0371 2532 0300 9327 1001 3 nFS in er : 2 59383 766 2 8 4 43 0G |0 0 0 0 000000000000000 753-9 909-6 2 31-37-2 FVF-0 1 2 3 4 5 7 8 9 1357914793 N1 2 3 4 5 6 7 8 9 0123456789 11