Each option contract represents the right to buy or sell 100 shares of stock. The terms behind an options contract are standardized by the OCC (Options Clearing Corporation). Currently, you must buy or sell whole contract lots (no fractional option contracts).
Currently Zingeroo only offers the ability to trade your options contract in the open market. The prices are representative of the contract itself, Zingeroo does not offer the ability to exercise purchased contracts at this time.