Sales cart class with discount and tax needed -- 2

I need a Cart class written with the following property * Cart & line-item support Fixed and Percent discount types * Cart & line-item support Support Inclusive and Exclusive tax types Cart and lineitem will have folllowing Properties ->Subtotal ->Total ->DiscountAmount ->TaxAmount ->DiscountRate ->TaxRate ->DiscountType ->TaxType When you are done coding, use the values to test and tell me the result lineitem1 Price=100, Qty=3, inclusive tax rate=10% , discunt 5% lineitem2 Price=100, Qty=2, exclusive tax rate=10% , discunt $5 Cart discount 10% You can write the class in any of the tagged languages