1. A steel rolling mill can produce -beams at the rate of 20 tons per week Customer demand for the beams is 5 tons per week. To produce -beams, the mill must go through a setup that requires changing to the appropriate rolling patterns. Each setup costs the mill $8,000 in labor and lost production-beams cost the mill $2,000 per ton and the mill has an annual holding cost of 30 percentWhat is the optimal production batch size for I-beams ? What is the annual setup cost of the optimal policy ? What is the annual holding cost?