Question

9 trucks arrive per hour. It takes 6 minutes after reaching the loading station. Two alternatives to modify the situation. One is to change the trucks and add a helper at the loading station at a cost of 50,0000. This would change the arrival time of the trucks to 6 per hour and the filling time of 4 minutes. The second alternative would be to add another loading station at a cost of 80,000. Tricks would wait in line for the next available station. Which alternative is the better of the 2?