Usage example:
<paypal-button business="[email protected]" language-code="it_IT" currency-code="EUR" item-name="My nice item description" amount="100"></paypal-button>
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business your PayPal business email
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language-code the code of the language of the button text
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currency-code the code of the currency you specify the amount (see below)
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item-name the description of the selling item
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amount the price amount of the item (the currency is specified in currency-code)