What elements are you using to show the prices? If the elements are organized by columns, than this is not possible. By the result in the mobile, i suppose they do are set in columns.
The elements follow one another in order when in mobile (or any small screen). Please see these screenshots for more:
This layout will result in your current situation in mobile: https://postimg.org/image/bcgtu5g39/
This layout will get you what you want in mobile: https://postimg.org/image/7indkzyr9/
