Which option describes the most cost-effective way for a skateboard company to purchase plywood?

Compare the price per sheet for each pallet: A costs $1,000 ÷ 100 = $10 per sheet, B costs $1,800 ÷ 200 = $9, C costs $3,500 ÷ 500 = $7, and D costs $8,000 ÷ 1,000 = $8. The 500-sheet pallet for $3,500 has the lowest cost per sheet, so it is the most cost-effective choice.

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