1.00
how much postage needed to send a manilla envelope that is 13.2 ounces?
I'm not sure, sorry I couldn't help. :(
From another US state to Utah, 41 cents for a letter weighing no more than one ounce, which would be a letter of about 3 to 6 pages at most.
It depends on where it is being posted from, where to and, quite possibly, its weight.