WWW.LONGTIMETRADE.COM is my shopping site, how to create the interface of credit card with visa or mastro?

WWW.LONGTIMETRADE.COM is my shopping site, is there any one who knows how to create the interface of credit card with visa or mastro?if so, how they charge me? by fixed fees per year&per month? or by fixed rate of the sum of each dealing? if so, how much is the fixed fees or the fixed rate?

Here are the links which can help. These are alternatives to your need:

1. A Comprehensive Analysis:

http://www.onenw.org/toolkit/accepting-credit-cards-on-your-website

2. Another How-To

http://www.thesitewizard.com/archive/creditcards.shtml

3. Paypal.com

https://www.paypal.com/us/cgi-bin/webscr?cmd=_wp-standard-overview-outside

Good Luck.
-N

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