Consolidated Restated 2021 2020 Note 16. Intangible Assets Note US$’000 US$’000 Computer software At cost 1,187 1,604 Accumulated amortisation (1,085) (1,393) Total intangibles 102 211 Reconciliation The reconciliation of the carrying amounts for computer software is set out below: Balance at beginning of financial year 211 376 Additions 25(c) 34 81 Disposal (39) – Amortisation expense (106) (159) Net foreign currency differences 2 (87) Carrying amount at end of financial year 102 211 Note 17. Exploration and Evaluation Expenditure Carried Forward The reconciliation of exploration and evaluation expenditure carried forward is set out below: Balance at beginning of financial year 41,204 59,957 Additions 25(c) 1,932 1,173 Transfer to development assets (refer note (a) below) 25(c) (1,553) – Exploration and evaluation expenditure expensed (refer note (b) below) – (2,619) Exploration and evaluation expenditure impaired (refer note (c) below) 5(c) (90) (81) Net foreign currency differences (640) (17,226) Total exploration and evaluation expenditure carried forward 40,853 41,204 (a)Exploration and evaluation expenditure relating to the Patola discovery, which has been transferred to development assets following declaring of a FID during the current financial year. (b)Exploration and evaluation expenditure expensed relates drilling costs incurred on the Marina 1 exploration well, which was drilled as an unsuccessful well during the prior financial year. (c)As part of the review of the Group’s non‑current assets as at 30 June 2021, exploration and evaluation expenditure carried forward has been impaired for continuing appraisal expenditure incurred on the Group’s Goiá light oil discovery in Block S‑M‑1101. The expenditure is carried forward on the basis that exploration and evaluation activities in the areas of interest have not reached a stage that permits reasonable assessment of the existence or otherwise of economically recoverable reserves and active and significant operations in, or in relation, to the areas is continuing. The future recoverability of the carrying amount of capitalised exploration and evaluation expenditure is dependent on successful development and commercial exploitation or, alternatively, the sale of the respective areas of interest. Karoon Energy Ltd 107 Annual Report 2021