Chris Sandvig Irrigation, Inc., has summarized the price list from four potential suppliers of an underground control valve. See the table below. Annual usage is 2,400 valves; order cost is $10 per order; and annual inventory holding costs are $3.33 per unit.
Which vendor should be selected and what order quantity is best if Sandvig Irrigation wants to minimize totalcost?

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Vendor A Vendor B PriceQuantity Quantity 1-49 50-74 75-149 150-299 300 499 500+ $35.00 34.75 33.55 32.35 31.15 30.75 1-74 75-149 150-299 300-499 500+ Price $34.75 34.00 32.80 31.60 30.50 Vendor C Vendor D Quantity 1-99 100-199 200-399 400+ Price $34.50 33.75 32.50 31.10 Quantity 1--199 200-399 400+ Price $34.25 33.00 31.00