Platinum and Iridium plugs perform at a lower level than copper spark plugs, because they are less conductive and they tend to overheat. However, the overall longevity of these two types of metal is better than copper plugs.
Carrying cost of inventory is often described as a percentage of the inventory value.This percentage could include taxes, employee costs, depreciation, insurance, cost to keep items in storage, opportunity cost, cost of insuring and replacing items, and cost of capital that help produce income for a business.Also referred to as inventory cost.his percentage could include taxes, employee costs, depreciation, insurance, cost to keep items in storage, opportunity cost, cost of insuring and replacing items, and cost of capital that help produce income for a business. Also referred to as inventory cost.
1 LIFO (last-in, first-out) is the opposite assumption: The newest units of inventory are sold before older units are sold. 2  The average cost method is a formula for calculating CoGS and ending inventory based upon the average cost per unit of inventory available for sale over a given period.eginning Inventory: 50 shirts ($3/shirt). Purchases: 100 shirts (60 at $3/shirt and 40 at $3.50/shirt). Her total units available for sale over the period is 150 shirts. Her total Cost of Goods Available for Sale is $470 (110 shirts at $3 each and 40 at $3.50 each).