Choose a Materials & Labour standard template file. Accepted: .xlsx (template shape, header row: CC Code | CC Name | Item | Unit | Rate (ex GST) | Rate (inc GST) | Supplier | Last Updated | Notes) or .json (with rates array).
+ Add / Merge adds new items and updates matching ones (by description + unit) — deletes nothing, safe for adding items. Replace swaps your imported library for this file (manually-added rates are kept). Replace has no undo.