2 Aski equipment manufacturer is planning to build a manufacturing plant in Europe. The and variable costs in U.S. dollars) for four potential plant sites are shown as follows: Potential Site Fixed Cost per Year $150,000 Variable Cost per unit Bern, Switzerland Vienna, Austria 85,000 Brussels, Belgium 100,000 Zagreb, Croatia 50,000 a. Graph the total cost lines for the four potential sites. b. Over what range of annual production volume is each location optimal? c. If the expected annual production volume is of the ski equipment is 8,000 units, which location would you recommend