Donating a unit of whole blood or double red cells (2-units) removes iron from your body. You need iron to make new red blood cells. Low levels of iron can cause anemia or make it worse. All blood donors should learn more about iron. 1  Everyone should eat a healthy diet.2  All blood donors should add foods rich in iron to their diet.ou need iron to make new red blood cells. Low levels of iron can cause anemia or make it worse. All blood donors should learn more about iron. 1  Everyone should eat a healthy diet. 2  All blood donors should add foods rich in iron to their diet.
Average cost method. Under the 'Average Cost Method', it is assumed that the cost of inventory is based on the average cost of the goods available for sale during the period. The average cost is computed by dividing the total cost of goods available for sale by the total units available for sale.
Activity-Based Costing vs. Product Costing. Activity-based costing allocates overhead costs based on process steps. Hemera Technologies/AbleStock.com/Getty Images. Product-based costing is a relatively simple form of allocating direct and indirect costs to individual units of product.