Change the price label for each variation of a product?

Custom Price Labels – Free or Pro Version
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Can the plugin change the price label for each variation of a product? We’ve tried all of the settings in the free version to see if we could enable the metabox on the edit product – variations section with no luck. We have products that will need to show a text label instead of price (i.e. $xx.xx/per month) that is not actually calculated on checkout so needs to be added as text. However, a variation of the product itself – say color or storage capacity, would need to display a different per month price text.

Is this a capability of the plugin? Can the free or paid version actually assign custom price labels within the production variation pricing itself? Happy to purchase the pro version if required for functionality.