The invoice is broken down to show product price and shipping excluding VAT, the total VAT on the order and also the total cost including VAT.

You can see in the example below

Product price is £3.03 excluding VAT

Shipping price is £3.46 excluding VAT

Total VAT on the product and the shipping combined is £1.30.

Total price to be paid £7.79

What is not shown explicitly is the postage charge including VAT which in this example is £4.15. 

To calculate this you can multiply £3.46 x 1.2