Breaking Down Transaction Table

My table transation consists of tranxid, custid, itemid, quantity, unit_price, payment mode, driverid. When I perform add operations and notice that customer 1 can buy at least one or two items more and so on. There is some duplication for the custid, itemid, driverid and payment mode. How can I resolve this duplications? Can I use the one to many/many to one relationship to split the transaction table into two table?