In this case payment of 4,075.10, £3,209.40 was made under the 2001 area based compensatory allowance scheme on 26 September 2001 in respect of 37.2 hectares of mountain type land at 57.14, £45 per hectare sum of 1,949.49, £1,535.35, under a compensation package agreed with the European Commission for farmers experiencing losses under the 2001 area-based compensatory allowance scheme. The additional sum is equal to 90% of the difference between the average sum of the headage payments under the 1998, 1999 and 2000 headage schemes and the amount payable under the 2001 area based compensatory allowance scheme.