How to get total sum

PROBLEM

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I have two tables.

Sales
------

ID    Charge    VAT
1     100      10
2     200      20


SaleProducts
------------

ID  Product    Auto   SalesID
1   aa         True   1 
2   bb         False  1

I want to get this

SaleOnProduct
-------------

ID    Product     Charge     VAT    Total   TotalAmount(All of total is plus)
1     aa          100        10     110     220  
2     aa          100        10     110     220

How can I do this. Please help me.

SOLUTION

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declare @Sales table (ID int, Charge int, VAT int)
declare @SaleProducts table (ID int, Product char(2), Auto bit, SalesID int)

insert into @Sales values
(1, 100, 10),
(2, 200, 20)

insert into @SaleProducts values
(1, 'aa', 1, 1),
(2, 'bb', 0, 1)

select 
  SP.ID, 
  SP.Product,
  S.Charge,
  S.VAT,
  S.Charge+S.VAT as Total,
  sum(S.Charge+S.VAT) over() as TotalAmount
from @Sales as S
  inner join @SaleProducts as SP
    on S.ID = SP.SalesID