postage

pay

The customer decided to pay postage for the package to arrive faster.

cover

The price of the package didn't cover postage, so we had to pay extra at delivery.

for ~

I need to save some money for postage before I mail these packages overseas.

in ~

I spent too much money in postage when I mailed those packages overseas last month.

~ on

I need to pay the postage on this letter before I mail it tomorrow.

postage and packing

When you order books online, you usually pay extra for postage and packing.