opłata pocztowa in inglese:

How did you obtain these old postage stamps?

You have bought more postage stamps than are necessary.

The price includes postage charges.

What will the postage be?

What's the postage for a letter to Poland?

Could you tell me how much the postage for a letter to Denmark is?

postage and packing BrE /postage and handling American English (=the charge for packing and sending something you have bought)

How much is the postage for a postcard?

The price includes postage and packaging.

Call the post office to find out how much postage is needed.

The official designs of the Government, especially its designs in connection with postage stamps and coinage, may be described, I think, as the silent ambassadors of national taste.

If they are not free, please let me know how much the catalogue and the postage to Japan are.