Fence Industries is preparing its annual profit plan. As part of its analysis of the profitability of its customers, management estimates that the $16,500 for sales support should be assigned to the individual customers from the information given as follows: Units purchased Purchase orders (annual) Customer A 115,000 5 Customer B 215,000 20 What is the amount of the sales support costs that should be allocated to Customer A assuming Fence uses units purchased to compute activity based costs? $3,300 $5.750 $10.750. $13200