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Which of the following statements is true?

A. When cost of goods sold as a percentage of sales increases the gross margin percentage will increase. B. It is possible for cost of goods sold in dollars to increase while cost of goods sold as a percentage of sales decreases. C. If gross margin percentage is the same for the current and past year, then sales and cost of goods sold in dollars did not change. D. Both B and C are true. E. All of the above are true.

Compared to a business with many retail outlets, an online seller with aggregated inventories tends to have lower per unit transportation costs across the entire supply chain

Indicate whether the statement is true or false.