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So you're visiting Australia on business for your company, and your host, a different company, is paying for your accommodation? That strikes me as rather unusual... unless you're working for the host, which would violate the terms of your visa.
The normal situation is that you're in Australia for meetings, exploring business opportunities etc, in which case it's expected that the company sending you pays. In any case it would be odd for you, personally, to pay, unless you're a one-man consultancy or something.