Venus Robotics can produce 25,000 robots a year on its daytime shift. The fixed manufacturing costs per year are $2.3 million and the total labor cost is $9.5 million. To increase its production to 50,000 robots per year, Venus is considering adding a second shift. The unit labor cost for the second shift would be 15% higher than the day shift, but the total fixed manufacturing costs would increase only to $2.8 million from $2.3 million. Compute the unit manufacturing cost for the daytime shift. Would adding a second shift increase or decrease the unit manufact