How to customize a quotation to show the order subtotal, VAT & totall,

Dear Managerians,

I would like to be assited how can l modify the quotion so that it should show subtotal of the items, Vat and total at the end.

The status quo is that it shows only Total without showing subtotal.

And where Vat has not been charged but we still wont to show it.

Your contribution will be valued greatly.