How to add shipping attributes to the Google Merchant feed?

How to add shipping attributes to the Google Merchant feed?

The module itself does not calculate any shipping values - weight, prices, etc. as those are calculated during checkout. Shipping costs for the products in the feed should be specified in the marketplaces where this feed will be uploaded.

As to Google Merchant Center, it should be done in the Shipping and returns tab of the general settings:



Shipping attributes in the feed shall remain as is:

<g:shipping>
    <g:country>US</g:country>
    <g:price>0 USD</g:price>
</g:shipping>