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sasol limited group  intangible assets
			Capitalised	Capitalised
		Patents and	development	exploration
	Software	trademarks	costs	costs	Total
	Rm	Rm	Rm	Rm	Rm
Cost
Balance at 25 June 2000	59	21	245	458	783
Acquisition of businesses	—	—	353	—	353
Translation differences	—	—	4	—	4
Additions
to maintain existing operations	32	1	48	—	81
to expand operations	—	—	105	252	357
Disposals and scrapping	—	—	(1)	—	(1)
Balance at 25 June 2001	91	22	754	710	1 577
Amortisation and amounts written off
Balance at 25 June 2000	12	11	170	—	193
Acquisition of businesses	—	—	221	—	221
Translation differences	—	—	4	—	4
Current year change	11	3	39	—	53
Impairment of assets	—	—	35	—	35
Balance at 25 June 2001	23	14	469	—	506
Book value at 25 June 2001	68	8	285	710	1 071
Book value at 25 June 2000	47	10	75	458	590
During the year, the remaining capitalised development cost of R35 million – USD4 million in respect of the Djambala fields in the Republic of the Congo’s Marine VI permit was impaired.

Amortisation rates
Software	–	33%
Patents and trademarks	–	20%
Capitalised development costs	–	20%
Capitalised exploration costs	–	4%

			Capitalised	Capitalised
		Patents and	development	exploration
	Software	trademarks	costs	costs	Total
	USDm	USDm	USDm	USDm	USDm
Cost
Balance at 25 June 2000	9	3	35	66	113
Acquisition of businesses	—	—	44	—	44
Translation differences	(2)	—	(4)	(8)	(14)
Additions
to maintain existing operations	4	—	6	—	10
to expand operations	—	—	13	31	44
Disposals and scrapping	—	—	—	—	—
Balance at 25 June 2001	11	3	94	89	197
Amortisation and amounts written off
Balance at 25 June 2000	2	2	25	—	29
Acquisition of businesses	—	—	28	—	28
Translation differences	—	—	(4)	—	(4)
Current year charge	1	—	5	—	6
Impairment of assets	—	—	4	—	4
Balance at 25 June 2001	3	2	58	—	63
Book value at 25 June 2001	8	1	36	89	134
Book value at 25 June 2000	7	1	10	66	84