That is a really cool setup! It looks like there might be a small issue with how the quantities/totals are being calculated:
In this screenshot, I have 1 basket selected. You can see that the purchase cost total is $14.65, while the total cost is $19.85 (a difference of $5.00 for the basket and $0.20 X 2 for the sandwiches). My first thought was that the $0.10 and $5.00 were assembly costs and maybe you didn’t want to include those in the pricing, but the basket would still need to be purchased.
For some reason, the List(Item, Quantity) is not showing the sandwiches, despite having them listed in the Items column:
