For particular main category items only need to allow discount coupon for sales ,it is very simple process under category manger-coupon column it can allow to make as 'No' so that particular category item it will not allow for sales under sodexo coupon.
For business scenario:Customer might do not need to allow sodexo for vegetable category items,for provision items alone will allow for sodexo coupon.
Step 1:Move to Inventory->miscellaneous->Category manager.It will show list of available main category.
Step 2:In this category manager for example second main category "TEST" alone items will allow for sales under sodexo coupon(item 1 will allow for sodexo) and for other items it will not allow for sodexo tender.
At the same time,it will allow to give yes for coupon column for single category alone.
Step 3:In bill entry for test category item rate is 25 and for product type item rate is 150 and total bill amount is 175.But in sodexo coupon tender it will allow to give only for 25 rupees.
For remaining amount 150 need to give on any other tender type.