Minibasket Attribute Pricing Issues

Expected Behavior

The minibasket product information does not display or take into account attribute pricing. So if I have $9 product, and $10 attribute, the minibasket shows that the item is $9.
In the default state, the minibasket also does not show the product’s correct sale price when the item has attribute pricing.

FIX: Change the &mvt:item:formatted_subtotal; variable to instead use a custom calculated item subtotal to show the correct price, both taking into account attributes as well as discounts. The calculation should be the group:subtotal + looping through and adding in all option:subtotal values for that item’s attributes.
I’ve attached a screenshot of my example code for the fix as well.
For future reference: I was going to suggest we use the subtotal_comprehensive variables as a solution, but this led me to discover some issues with the subtotal_comprehensive variables available to us that Jon has now filed a bug for v10.

*Chrome / Windows10 / Desktop