Sale price component


Im Zaydoon

Im working on imlementaion on sales module in navision 2009 I have problem with item price additional cost (price structure)

I mean the user request as follow

when he fill the quantity in Sales order system should get the item price from itrm card then to two additional fees on of this fees is 5% of total value and another one fixed amount as 25 $ for each order (should be calculated Automatically) not as manual charge item in the order

then to calculate VAT