Struggling with simple pricing option

Hi,
I think I am doing this the right way.

i am selling Crystal Glass. Easy. however, I can either engrave letters or a logo.
I have set up a separate product for the engaving, which is just pence per letter. Ok so far.
I can also engrave a logo. This has a high upfront cost, (£40) and then for the second and subsiqent glasses it is just £5. So 6 glasses would cost:
(40 x 1) +(5x5)

I cannot for the life of me work out how to do it. Can anyone help please?

Also, I have got an attribute for customers to upload their logo file. where on earth does it go to? :blush:
Thx in Advance

Sounds like you need to buy a copy of the manual - see the link at the top-right of the page, but while you wait for it to arrive...

Have the logo as an attribute and use one-time charges (page 189-191 of the manual :wink2: ) where you price the attribute at £5 with a one-time of £35 .

Uploads - images/uploads (see http://www.zen-cart.com/forum/showthread.php?t=58887)

RYK, Thx for that.
I have the manual, but having spent 4 hours reading it on the train to London and back, my head was spinning:wacko:

And I looked in the uploads folder when i was testing, just completely missed the content!

Help much appreciated.