Solid waste policy in the United States produce large amounts of waste in small areas. For example, EPA reports that a single dairy cow produces approximately 120 pounds of wet manure per day equaling to that of 20-40 people. The main problems of animal waste mismanagement are environmental, especially water pollution. Industrial waste consists of a significant amount of solid waste. EPA reported that each year United States industrial facilities generate and dispose of approximately 7.6 billion tons of industrial solid waste based on 1980s figures. This figure includes waste generated from 17 industrial manufacturers of organic chemicals, inorganic chemicals, iron and steel, plastics and resins, stone,
Economic order quantity it is a function of only K, D, h. The optimal value Q* may also be found by recognising that formula_10 where the non-negative quadratic term disappears for formula_11 which provides the cost minimum formula_12 Economic order quantity = formula_13 formula_14 = 400 units Number of orders per year (based on EOQ) formula_15 Total cost formula_16 Total cost formula_17 If we check the total cost for any order quantity other than 400(=EOQ), we will see that the cost is higher. For instance, supposing 500 units per order, then Total cost formula_18 Similarly, if we choose 300 for the order quantity