Instead of buying parts for his Model Ts from suppliers--each with its own price markup--he could keep cars affordable by making the parts himself.

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Most distributors buy products from Herbalife at a 50% discount, resell them at full price and pocket the markup.

FORBES: Supplemental Income

Ms. Black said profit margins on unit-dose detergents are constrained because the wholesale price is already high, so the retailer is wary of putting too much of a markup on it.

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