definiens: means, for any period, the actual gross amount invoiced for sales or other commercial dispositions of Aeroquin - Related Product s during such period by the Purchaser or its Affili ates or sublicensees to distributors or other unaffiliated third parties in arms’-length transactions ; or by d istributors to the extent such Aeroquin - Related Products were sold to them by the Purchaser or its Affiliates or subl icensees in transactions that are not at arms ’ length ; reduced by the following to the extent applicable to such s ales : ( a ) all discounts granted on the Aeroquin - Related P roducts ( including all trade, quantity and cash discounts ) actually allowed and properly taken ; ( b ) all credits, rebates, retroactive price reducti ons and chargebacks [ * * * ] with respect to such Aeroquin - Related Products, and all reimbursements, allowances and credits to customers on account of rejection or returns ( including wholesaler and reta iler returns ) or on account of retroactive price re ductions with respect to such Aeroquin - Related Products, in each case where actually allowed and properly taken ; [ * * * ] Certain information in this document has been omitted and filed separately with the Securities a nd Exchange Commission Confidential treatment has been requested with resp ect to portions of this agreement