This is obviously a highly abbreviated line item on the income statement. I would talk to your client and get the entire wording before attempting a translation. P/couv ch spécifiques is presumably 'pour couverture des charges spécifiques' (for coverage of specific charges). Translation of quote-part will depend on the context of the rest. The best advice I can give is to talk to your client and if that's not possible, talk to a French-speaking accountant. I've put a couple of web addresses below.