As of December 31, 2017, options to purchase 7,663,220 shares under case study answer Plan were issued and remarkable. At December31, 2017, an mixture of 332,536 shares remain accessible for future grants under case study solution Companys stock option plan. TheCompany recognizes compensation price related to case study solution fair value of stock based awards issued to its staff in its financialstatements. The Company is needed to estimate case study solution fair value of stock based payment awards on case study solution date of grant using an option pricingmodel. The Company uses case study answer Black Scholes option pricing model to price options. The Black Scholes model calls for case study solution use of assumptionsregarding case study answer risk free attention rate; case study solution expected dividend yield; case study solution weighted common expected life of case study answer option; and theexpected volatility of case study solution unit price.