Chemical Energy Stored in Glucose Can Be Used to Convert $\rightarrow$

Chemical energy stored in glucose can be used to convert ADP to ATP; under normal physiological conditions the process, shown below, is 38.3 % efficient:
C₆H₁₂O₆ + 6O₂ + 36 ADP + 36 H₃PO₄ $\rightarrow$ 6CO₂ + 36 ATP + 42 H₂O $\Delta$ G° = Given that the reaction: ADP + H₃PO₄ $\rightarrow$ ATP + H₂O requires 30.6 kJ mol^-1 determine $\Delta$ G° for the reaction of glucose and ADP above.