Why can I not change a cost?

Only an owner or an admin can change costs. If your role is Analyst, the cost pages open for reading only. You can open every cost and read it, but its fields are greyed out.

Where the save pill would be, a dark lock says Only an owner or admin can change costs. On a phone or a narrow window it sits at the bottom of the screen. On Overhead, the panel's footer says it instead. The Reorder lead time card on the Products page works the same way: you see the number, but there is no Change button. Lead times, weights and packaging sizes follow the same rule.

To change costs, ask the owner of your workspace for the Admin role. The owner manages the team in Settings, then Team. An Admin can change costs, but not billing and not the team.