Expanding inventory from retail to manufacturing

Let me share what I encountered in the test business.

Customer A ordered 1 pc of t-shirt, I issued invoice as illustrated in pic.

Then, I ordered raw materials as in 2nd & 3rd pic.


Then I made the production order

Assuming order has been delivered to customer. This is how the inventory look now

Assuming end of month, i need to pay the worker so i created payslip.

As ilustrated in summary, why INVENTORY - COST only 4.00 and salary & wages only 960.00?