MibianLib is an options pricing library offering the ability to calculate the price, the implied volatility, the Greeks or the put-call parity of an option using the Garman-Kohlhagen, Black-Scholes, and Merton models.
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A document viewer for PostScript, PDF, TIFF, DjVu, and other formats.
One step check out is a magento extension. It's a simple way for the customers to complete the checkout.