Amount for the IM transaction in F4111 is not matching F0911

Hi,

We have an issue where the amount for the IM transaction in F4111 is not matching F0911. Below are the details of the scenario,

1. The transactions were posted in F4111 on Transaction date: 29/10/2018 and populated in F4111 on GL date: 30/11/2018.
2. The cost of the item was updated on 03/12/2018 as 960.1033.
3. The GL batch having the IM details was posted on Batch date: 03/12/2018 by the report R12803.

Below are the cost and units details,

IM
F4111		F0911
Unit cost	974.6588	Unit cost	960.1033
Quantity	Extended cost	Quantity	Extended cost
9.79	9,541.91	9.79	9,399.41
40.74	39,707.60	40.74	39,114.61
50	48,732.95	50	48,005.17
40.21	39,191.03	40.21	38,605.76

Queries:

1. Why was the cost on the day of transaction not updated in F0911?