Tab 1 lists three vendors' unit prices: $12, $15, and $10. Tab 2 shows order quantities of 500, 300, and 800 respectively. Which vendor incurs the highest total cost?
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A
Vendor 1 ($12 × 500)
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B
Vendor 2 ($15 × 300)
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C
Vendor 3 ($10 × 800)
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D
All are equal