Average costing
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. Average cost is computed by dividing the total cost of goods available for sale by the total units available for sale. This gives a weighted-average unit cost that is applied to the units in the ending inventory.
See more at Wikipedia.org...
unit cost
Noun
1. calculated cost for a given unit of a product
(hypernym) cost
Unit Cost
Unit Cost
the price of one unit of a product.