Showing the SKU on your purchase order will only take few steps to setup, kbfholdings.

Here’s how:

1. Click the Gear icon at the top.
2. Select Account and Settings.
3. Go to Sales from the left menu.
4. Click the pencil icon on the Product and services section.
5. Put a checkmark for Show SKU column.
6. Select Save and Done.

This should create a separate SKU column in your purchase order.

Please let me know if you have further clarifications.