Components not adding up??

[party_pete]

I have a product e.g.

Cowboy Costume £10.00

with components

Add a Cowboy Tash for £1.00
Add Cowboy Spurs for £2.00

If the component boxes are ticked and the customer proceeds to checkout, the £10 + £1 + £2 are all listed until "next" is clicked to go to the payment screen. Then the only amount showing (and charged for) is the main product, in this case Cowboy Costume.

Any ideas what i'm doing wrong?

[I-CC]

Go into the Advanced tab for the product concerned and onto the Components tab and change it to Sum of Products and Components Prices and then that should do it for you.