$.12\mathrm{.}17$ Drolet Manufacturing Company. in Saint$-$Hubert. Quebec, makes flashing lights for toys. The company operates its production facility $300$ days per year. It has orders for about $12000$ flashing lights per year and has the capability of pnucing $100$ per day. Setting up the light production costs $$50.$ The cost of each light is $$1.$ The holding cost is $$0\mathrm{.}10$ per light per year. a$)$ What is the optimal size of the production runt b$)$ What is the average holding cost per year c$)$ What is the average setup cost per year? d$)$ What is the total cost per year. including the cost of the lights? PX