Additional Unit Price with Options suggestions

In Instant and Cart pricing this is shown:

Unit Price: $XX.00

Could you add something like Unit Price including Optional Items: $XX.XX to show the Product Configurator items in the unit total?

Well...
in cart, the "unit price" only represent the item's price itself.
As product configurator entries are priced as addons, they're not shown there. The final price, including also addons, is infact shown below where Draft Price: $ XX.00 is shown (while in instant pricing it's the TOTAL PRICE on top).

In cart, there's a class (cartline_unitprice) for the unit price and one (cartline_draftprice) for the draft price.
If what you want is to give more visibility to the final price including addons (so, the draft price), what about hiding via CSS cartline_unitprice and use cartline_draftprice to make the draft price line more evident?
Both texts are also available in text labels, so I think this should work.

In instant pricing, unit price classname is different (instant_pricing_unitprice).
As per the total on top, easy to control via the instant_pricing_header_row ID

Well...

Clarification is in order using examples...

We use RTD for showroom sales and some customers want to know one thing, "What's my bottom price". We have that, as you said, in final price, including also addons, is in fact shown. In cart and instant pricing.

Other customers want to know "What is my price per product". For whatever reason, maybe comparing prices, they aren't interested in the bottom line. This happens often. They want to know per piece with the addons what it costs. We end up having to grab the calculator and dividing the TOTAL PRICE by the qty items to get the Unit Price with Addons.

It's not a big deal, we just know that it is there in Email & Export Template codes [ITEM_UNITPRICE_INCLUDEADDONS], so it could be useful here.

I see your scenario, but there would anyhow be a math issue there.
Being treated as addons, pricing of Configurator fields can be anything: baseprice, qty based, product based, etc...
This is the main reason for which they cannot be shown as part of the unit price: only qty based addons could.

Infact, even the ITEM_UNITPRICE_INCLUDEADDONS code you mentioned only exports Unit Price plus "qty based" addons value.
But doing the same in cart could cause confusion IMHO: at the end they're listed as addons, so visually it could give the impression that the qty based addon is added twice, considering they would be added on top, but also shown below the unit price

In visiting this again we have a suggestion.

Could you create a new calculation field in Instant pricing that does the following:

Total Price minus Shipping Method Price divided by Quantity = Unit Price including Options

With a text label and display none as default, those who want to use it can display?