A shop makes candles. Monthly demand is 360 boxes. Raw materials can be produced (supplied) at a rate of 36 boxes per day. Daily usage rate is 18 boxes per day. Assume that demand is uniform throughout the month. Setup cost is $60 for a run, and holding cost is $2 per box per month.
Hint 1: Setup cost should be treated as ordering cost.
Hint 2: Larger time unit is the month and smaller time unit is the day.