Four levels, ten recordings each. What changes is how the speaker moves through the table — across the rows at first, then down a column while you hold the grid in your head.
You hear: “Oak comes in at twelve pounds the metre. The ash — and ash is what most people end up taking — is nine.”
The table says: Ash | Cost (£) → 9
Two prices are spoken and the table asks for one of them. The row label decides it: the twelve belongs to oak. Notice also that the heading already prints the pound sign — so the answer is the bare figure. Writing £9 or nine pounds loses the mark on a technicality, and that technicality costs candidates marks in the real test every day.
Carry into the mock: read the column headings before you press Play, and decide what kind of answer each gap wants.