Hi @boppar,
I’m curious, since you opened this thread on the Storefront theme, by any chance did you test if you switch your theme to another theme does the issue go away? OR what led you to believe the issue lies with Storefront?
The theme shouldn’t affect this, the amount of decimal numbers to be used in your store is defined in the WooCommer General Settings → Currency options → Number of decimals. How many decimals does it show on your store? Is the problem only with GMC?
Additionally, may I know which plugin are you using to sync your products to Google Merchant Center?
In the meantime, I’d like to understand your site properly. Please share with us the necessary information below for us to investigate the issue further:
- System Status Report?which you can find via WooCommerce > Status > Get system report > Copy for support.
- Fatal error logs?(if any) under WooCommerce > Status > Logs.
You could copy and paste your reply here or paste it via https://gist.github.com/ and send the link here.
Once we have more information, we’ll be able to assist you further.
Thanks!
-OP