Under the last-in first-out (LIFO) inventory valuation method, a price index for inventory must be established for tax purposes. The quantity weights are based on year-ending inventory levels, use the beginning-of-the-year price per unit as the base-period price and develop a weighted aggregate index for the total inventory value at the end of the year.
Unit Price ($)
Product Ending Inventory Begining Ending
A 500 0.15 0.19
B 50 1.60 1.80
C 100 4.50 4.20
D 40 12.00 13.20
What type of weighted aggregate price index must be developed for the LIFO inventory valuation?