To compute weighted aggregate price index using Laspeyres and Paasche method.
a. The subsequent table reports prices and usage quantities for two years in 1990 and 1992.
Item

1990

1992

1990

1992

A

1450

1500

9

11

B

540

650

4

6.5

(a) Compute a weighted aggregate price index for the two items using the Laspeyres method.
(b) Compute a weighted aggregate price index for the two items using the Paasche method