definiens: — shall mean a SLA AFFILIATE or a third party to which SLA has granted rights under license or sublicense as the case may be, to develop, promote, distribute or sell the PRODUCTS in the TERRITORY or part thereof ; 1.5 — shall mean the gross sales of the PRO DUCTS invoiced by SLA its LICENSEE(S ) or ASSIGNEE(S ) or their marketing partn ers, as the case may be, to third parties in arms length transactions, less all excis e and other sales taxes, charges for freight and other duties, all trade, quantity and cash discount s, all rebates and charge backs, allowances or credits to customers on account of rejection, withd rawal, recall or return which are customary in the pharmaceutical industry and which SLA, the L ICENSEE(S ) or the ASSIGNEE(S ) or the marketing partner, as the case may be, have to pay or absorb on such sales