FIFO VALUE FOR UNIT PURCHASE

[MBarnabas]

hello everyone, i have the common fifo code , i need help in that if i sell one product , its corresponding unit product cost should be based on fifo, but it only applies if i sell more products say 5, and even when the previous stock is finished but i enter a lesser value, the unit cost is still referenced to the very first stock
reference Column K, to be based on FIFO,

thanks