How do I arbitrarily add twenty cents of additional postage to all labels?
It might seem silly, but I if wanted to burn twenty cents on every order to ensure I'm not underpostaged due to the post office deciding I'm over an ounce limit, how can I do that?
No, because adding an ounce changes the postage by a different amount depending on the package or method.
I want "always add ten cents, irrespective of anything else."
Also, adding an ounce to the weight is a manual process as well as simply being wrong. I'd like accurate weight. I just want an extra dime purchased.
I deal mostly with shipments under 1lb and do not have the concerns you do. I do not get things rejected for being overweight, and I know I push the limit sometimes. Big to me was knowing where USPS did their jumps in price. For me, items only go out under 4 different weights...4oz/8oz/12oz/15oz.