1. In supply chain management it is often necessary to choose between two suppliers in an efficient manner. A manufacturer of electrical components faces an annual demand of 10 000 units. A supplier can supply 2 000 units. The shipping cost is R30 000, the price per unit is R50, the carrying cost is R10 and the administrative costs are R5 000 in total. The lead time is 5 days. Calculate the annual total costs for this supplier if the company operates 250 days per year.

2. A manufacturer's annual sales at cost is R5 772 000 and the average aggregate inventory value is R680 000. The inventory turnover is:

3. A bakery sold 3 800 pies in a week. In week 2 they sold 4 300, 3 900 in week 3, 4 500 in week 4, and 4 800 in week 5. Using a 3-period weighted average method with weightings of 0.5, 0.3 and 0.2, what sales would they forecast for week 6.