You can preset configurations in your personal account in Seller Assistant which will be automatically applied in calculator.
To configure extension settings go to "Tools/Seller Assistant" section and choose "Extension settings".
Then choose a specific Amazon marketplace where all these settings will be applied.
Preset configurations will be applied only to the selected Amazon marketplace. For different marketplaces you have to preset different calculator configurations.
On this page you can configure expenses for FBM and FBA logistics:
shipping cost per kg (or per pound for amazon.com)
shipping cost per item
prepare/labeling cost per item
fragile/bubble wrapping per item
Measurements and currency are automatically changed depending on the selected Amazon marketplace.