I've designed several Topsy designs for a bride & groom coming this evening... BUT I forgot that carving each tier might effect # of servings... can you please help?

How do I figure this one out? I've not given a quote yet... but if it needs to feed 75, is there a formula to figure out the Topsy Turvy servings?

And does anyone please have a Topsy cutting guide?

Thank you.

I was wondering the very same thing today... have a customer asking but
the only topsy turvy i did was for family so servings didnt matter, we knew we'd have enough
Not only did I carve a little to taper the cake, but I also used three 2 inch layers instead of the normal 2 layers.
I use the wilton chart, so if the bottom tier is 10 inches and normally serves 38, wouldnt it serve 56 with three layers, minus a few for the carving?
Or the middle tier 8 inches normally serves 24, three layers would be 36...

I hope this makes sense... Maybe someone else can offer some good
suggestions...