In the Fulfillment by Amazon (FBA) model, sellers pay storage and fulfillment fees including; long-term storage fees, unplanned services fees, and returns processing fees.

True is the correct answer because, in the Fulfillment by Amazon (FBA) model, sellers are required to pay various fees, including storage and fulfillment fees. These fees encompass long-term storage fees, which apply to products stored in Amazon’s fulfillment centers for extended periods, unplanned service fees for any unforeseen actions related to inventory handling, and returns processing fees for items that customers return. These costs are part of the overall fee structure that sellers pay to have Amazon handle storage, packing, shipping, and customer service for their products. By utilizing FBA, sellers benefit from Amazon's vast fulfillment network, but they must be mindful of these associated fees to manage their profitability effectively.