Solve the following. a) Ohene's hardware supply distributor carries boxes of 3-inch bolts in stock. The annual usage is 1000 boxes, and demand is relatively constant throughout the year. Ordering costs are $20 per order, and the cost of carrying inventory is estimated to be 20%. The cost per unit is $5. This value for the order quantity is the economic order quantity. Using the formula of EOQ calculate the value. b) Nkunim's firm carries an average annual inventory of $2,000,000. If it estimates the cost of capital is 10%, storage costs are 7%, and risk costs are 6%, Determine how much it cost per year to carry this inventory? c) Operations and marketing work together for the growth and development of your organisation As a student of operations management identify any five (5) benefits for such collaboration. d) Briefly explain the purpose of each of these control charts: 1) x-bar ii) Range 111 P- charts iv) c-chart e) Briefly define production system and briefly explain how the concept of production system help in understanding operations management