ahmad's company sells 100000 unit of electric fans per year in a price of 150$ per unit and cost of 100 $ per unit, and each unit cost the company 25% as a carrying costs , the firm excuting 10 orders per year with cost per order 800$ find the following values : 1- Total inventory costs : 4$ 2- Economic order quantity EOQ : 4 3- Total inventory costs after applying the EO