"Every successful business creates or provides something of value that other people want or need at a price they're willing to pay, in a way that satisfies the purchaser's needs and expectations and provides the business sufficient revenue to make it worthwhile for the owners to continue operation."
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Source : "The Personal MBA: Master the Art of Business". Book by Josh Kaufman, August 28, 2012.
Source : William Bartram (1794). “Travels Through North and South Carolina, Georgia, East and West-Florida (etc.) 2nd Ed. - London, J. Johnson 1794”, p.20