Amanufacturing company sells its products directly to customers and operates 5 days a week, 52 weeks a year. the production department of this company can produce at the rate of 60 units per day. the setup cost for a production run is $ 125.00. the cost of holding is $ 4.00 per unit per year. the demand for the item is continuous and constant and is 3,900 units per year. (note: the demand occurs only when the company is operating, that is, 5 days a week for 52 weeks). find the optimum number of units to be produced in one batch.