Hey guys need some help if possible,i am creating a shop through java and i am little stuck on finalising the subtotal and total cost of items. The subtotal is Excluding the VAT price and total cost is cost of item including VAT. The way i have designed this is by using JButtons method to add items to the list, which contains the value of item such as 599.99. The price of items are declared as a double value aswell so double item1 599.99; for example How would i go about adding multiple variables altogether into the subtotal/total field? The subtotal and totalfield is initialised in JtextField method. For example 599.99(item1/button1) + 239.99 (item2/button2) = 839.98(subtotal field) Much advice would be appreciated without providing my code.