I want to assume a scenario I have (secondary-items) A,B, C ,D and E. . I also have (primary-items ) a1,a2,b1,b2 and c1,c2. In order to sell an instance of any secondary product as a combo item , I need to be able to combine based on what my need is going to be a mixture of any given primary items to get my desired results .Can you code this for me in the POS where just one particular item will have this feature and allow me to select the needed components when selling it in the POS terminal and deduct the selected components from the item stock on the system without changing the original price of the secondary item. In the table below is the given item in the database I want to apply this to. How much would you charge for this feature !!?