Hi @amafino,
Sorry to hear that the plugin didn’t work for you.
We would like to let you know that it is important to include the unit along with the value that is stored in the product in order to import unit pricing and unit base data to Google Merchant Store. Please let us know if the unit price and unit base values for the products on your site include the unit. If it’s not there, please include it and try again.
To learn more about the supported units, please read the page below: https://support.google.com/merchants/answer/6324455#zippy=%2Cvariants
Regarding the variants, in WooCommerce currently there is no option to add the custom fields unit price and unit base to the products. We will include the option to add custom fields to the variations to our backlogs and if feasible we will include it in the future releases of the plugin.