Corporations typically get going hedging materials purchases at what amount?
Answers: Companies try to maintain a supply line, or inventory of a set number of days. For example, grocery stores may want to hold 4 days worth of milk on the shelf. When the store predicts that milk purchases will fall off (people on break, people drinking more coke), they 'hedge' their future purchase of milk.
Forecasting is exceptionally complex and requires knowledge of statistics, economics, planning, and accounting. It is probably beyond the scope of addqa.coms.