The final Stock Cost amount is the average value of all 'Stock Received' actions in each medication history. 

Example of Calculation

From the above medicine, the final stock cost is RM0.63. Here's how Yezza calculate:

(RM0.63 + RM0.65 + RM0.62) / 3 = RM0.63

FAQ

How to get my intended Stock Cost?

Ans: You will need to edit each Stock Received action to get the final amount that you want.