gulps oil company obtains crude oil via a pipeline that is either turned on or off to supply 5,000 barrels per day. the company wants only 1,000...

gulps oil company obtains crude oil via a pipeline that is either turned on or off to supply 5,000 barrels per day. the company wants only 1,000 barrels per day. holding cost are$1.00 per barrel per day, and set-up costs are $4.00. Assuming an eight-hour day, how often shoudl the pipline be turned on