Userform for medical store or super market

hay,
i am tray to create user form for make bill format for super market example if enter in text box the item name etc. then add data in to excel sheet with excel formulas and if customer buy more then one item when enter another item name in to text box it's need to go with same bill number and when search with bill number it's need show all carrying with that bill number and we can print bill fromat paper, please some one help me, if give me another example to make bill of bunch items

thank you,