Hello,

I sell Stamp Albums on CD internationally. These are posted in padded envelopes. One weighs 37 gm and postage costs are $2.60.

The next postage bracket is 51gm to 250gm and cost $6.45. I want to add the difference for the first additional CD, then do not add anything for any additional CDs.

In summary, I want to charge

1 CD = $2.60

2 CDs = $6.45

3 CDs = $6.45

4 CDs = $6.45

Any help will be appreciated.

Robert