Only one postage stamp is needed. However, it needs to be for 98 cents.
It takes 42 postage stamps
It depends where you want to send it from.
The number of stamps must equal the amount of postage. The postage depends on the weight and and form of transport.
How many stamps are needed to send a letter from Texas to Alaska?
The stamps have to add up to 45 cents.
how many stamps for a 10.4 ounce envelope
one
To send a letter from the US to Peru, you need 94 cents postage. No special stamps are needed.
700 Stamps
total postage rate (first class, not heavier than 1 oz) is $ 0,49.
Whenever I have questions on cost for postage I just use this, http://ircalc.usps.gov/ I don't have a direct answer for you, but the next best thing would be to take the card into your local Post Office & pay for the postage there. You can pay for the exact postage rather than havening to deal with spending extra on stamps than you needed to.