A firm exports ceramic tiles. In Year 1, the average export price was £15 per box. Its export volumes are shown below.
| Year | Export volume |
|---|---|
| Year 1 | 80,000 boxes |
| Year 2 | 64,000 boxes |
Calculate the firm's export earnings in Year 1.
Calculate the minimum average export price per box the firm needs in Year 2 for its export earnings to be no lower than in Year 1.
Explain why the percentage rise in the average export price needed in Year 2 is greater than the percentage fall in export volume.