Transport to Shuanglin and Zhenguo

Hi! I am travelling to Pingyao next week with my mother, staying for two nights, and plan to spend a day by visiting Zhenguo and Shuanglin Temple. What is the easiest way to get there, and then back?

How much should we pay for a cab/driver to drive us to the two temples, wait for us, and then drive us back ?

Thanks!
Jojje