Do you feel this is a clear way to show page multipliers? Notice on the hover hint, you can see the value before multiplication as well as after.

For the takeoff totals on the right, it would show the value after the page multiplier is applied.
Do you think the label (in white on the area behind the hover hint) should show before multiplier or after multiplier values?
There are lots of places in the UI where we would have to determine where to show before or after multiplier values.
I think the cleanest and least confusing approach is:
Reasoning:
Red means Mario just died. Blue means power-up. The ×4 is a power-up.
Id keep it simple and happy with just that on the page on the left. Now that your are showing the calc in the yellow box that is kind of nice and clear tho…..just make it blue.
Drop the update and see what else people want. Love it!

I like where this is heading. My only suggestion is to keep the door open for future development. At some point it would be valuable to be able to define what each instance of the multiplier represents and be able to break them out and group them with other elements of the takeoff.
White box totals should show totals before the multiplier. No question about it in my mind. That white box should represent that area. An Account Manager/Project Manager coming in and looking at this and thinking that the displayed area is 4x the actual size is a disaster waiting to happen when adjustments are being made in real time in the field. I've seen this happen. Multipliers are something that I always encourage my estimators to be very careful with. In Planswift, I set up our templates so that the quantities in the takeoff summary would indicate any applied multipliers by displaying the multiplier in parentheses next to the quantity.