Boosted by trade houses, more West African oil to sail east in Sept

* China's buying slips, India rises

* Trade houses sailing oil east on low freight

* Indonesia's Pertamina also books six cargoes

* Graphic: http://link.reuters.com/sav75v

By Libby George

LONDON, Sept 2 (Reuters) - The amount of West African crude

oil heading east in September is expected to reach a five-month

high, driven in part by trading houses, according to a Reuters

survey of shipping fixtures and traders on Friday.

At least 60 cargoes, carrying the equivalent of 1

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