How To Boost The Signal On My Cell Phone

Aug 13,  · Answer (1 of 5): A P stamp may cost $ but it is only worth 90 cents. The rest is a service charge. You need one P stamp plus another 37 cents worth of postage to send a postcard to the USA. The current rate is $ for up to 30 grams. If the card is fancy, or has a recording in it, the r.