What is it?

Continuation of Add Sales Order Line.

When do I do it?

After setting the quantity and delivery date.

How do I get there?

From previous page (already there)

What must I do?

Verify the price is correct or enter the desired price in the Price field (un-check Use recommended if necessary).

Verify the Unit Qty field or set it (this is the quantity the price applies to).

Press Save, Close, etc. as appropriate.