Benton Company is preparing its annual profit plan. As part of its analysis of the cost of its purchasing activity, management estimates that the $45,000 for purchasing support should be assigned to the individual vendors from the information given as follows: Vendor A Vendor B Units purchased Purchase orders (annual) Number of shipments recelved 130,000 7 21 230,000 28 84 What is the amount of the purchasing costs that should be allocated to Vendor A, assuming Benton uses units purchased to compute activity-based costs? O $9,000 o $16,250. O $28750 o $36,000