Inventory acquisition cost

1.5 in the inventory

1 in cos

0.5 as gain

You have 1 in trading cause it sets off with purchases

If that particular 50 k is not payable by the company, at that time you should book the value of 1 Cr but at the same time you should punch the whole inventories ( promotional gifts too ) in your books .

In pl

Dr. Inventory 1

Cr. Cost of sales 1

Again

Dr. Inventory 0.5 

Cr. Gain/promotions 0.5

Inventory is valued at lower of cost or NRV but not purely on purchases cost. As, indas, IFRS 2 doesn't address  free stock. But revenue recognition does as part of variable consideration eg. Buy one product and demand one free. If it's a b2b scenario, accounting must be done right?