If it were a two tiers, and you needed to serve 100, then I would use a
14, 10,......that's about 100 servings. I'm not sure how that will look having two big cakes as the two tiers though. That's the thing...it doesn't get small at the top like what you see in the picture. Another option would be to make the smaller cake, and then have a sheet cake in the kitchen. There are many options there. The cake isn't that hard to duplicate, so I would charge about $200 -$250. For those larger sizes, the 14, and 10. If it were the smaller sizes, like a 10, and 7, then I would charge about $150 -$200. I have to tell you that I live in Central Illinois, and the prices around here are pretty low. Very seldom do you even get orders like that, and wedding cakes usually aren't done over the top. My last one was a 3 tiered simple fondant to serve 100 and I charged $350 for it, and I still got a wierd look from the bride. lol I took a deep breath and just let her think on it for a moment and there was no problem after that. lol I'm sure someone else on here will give you a different price based simply on location. It can vary so much! ahhhhhhhh I wish we could all get paid what Duff gets paid! 
Good luck. It looks like a fun cake!
I'd charge $500 for the cake and $40 for the GP accents and do a 6-9-10 configuration. 
That should say 6-9-12 rather than 10. I'm leaving it though since it was referenced in another post. 
It's been a looooooooong day.
Oh woops.. I meant 6-9-12.. 
apparently I use the chart that I got from the flying unicorn... LMAO!! 
Just sent her an email, told her it would be $2.50 per serving with the cake covered in buttercream with fondant decorations, 3 tiers. I also told her if she wants additional flavors (cake, filling) it would be $0.25 extra per serving per flavor. I know it may be on the cheap side, but I figure if I at least make $150, its worth it. Also, she has asked to place a couple more orders for next month, I don't want to scare her away with crazy prices. I'll let you know what she responds.
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