28 cents is the current post card rate.
It depends on which country you are posting from and where the destination is.
you put it in an envelope and go to the nearest mail box and put it in the outgoing slot. Your Welcome
It depends on which country you are posting from and to which country.
45 cents
Depends from which country to which country.
If you mail it in a traditional 5 x 5 cardboard mailer it will weigh about 1.2 oz. thus cost $0.84.
The cost to mail a 5.75 x 8.75 envelope will depend on the weight of the envelope. As of May 2014, the cost to mail a standard letter is 49 cents.
4 to 5 cents a minute, it depends on which card you get. You can buy different ones. Say they have a 200 minute card, it would be 200 x .4 cents which would be 80.00. If you buy a smaller card you pay more per minute. A 30 minute card is probably 5 cents per min and would cost you: 15.00
5.25 X 5.25 envelope
As 5 pens cost Y Dollars', 1 pen' price is Y/5. Then, X pens will cost: XY/5$
5x5=25