Among which of the following industries are purchasing costs the LOWEST percentage of sales?

Question

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Among the given options, restaurants are typically known for having lower purchasing costs as a percentage of their sales. This is because they purchase mainly perishable goods and ingredients directly from wholesale markets, with little need for technological inputs or raw material extraction. On the other hand, industries such as automobiles, petroleum, lumber, and chemicals require expensive raw materials, advanced technology, and specialized equipment, leading to higher purchasing costs as a percentage of sales.

Among Which of the Following Industries Are Purchasing Costs the LOWEST