I did a PS3 controller for my husband birthday and now a customer want the same cake. I don't now how many it will serve and how much to charge.
It's a 9 X 13 X 5 carved, the real size is about 7 X 12 X 4 1/2.

Can you help my with this quote????
how many serve and how much per serving
Sorry for my english but it's not my first language

Neat cake.

I have a minimum for carved cakes of $125 no matter how many it will feed. If it feeds less than 20 = $125; more than 20 then $5.75 per serving.

Well . . . a 4+" tall 9 X 13 (and that's how much you baked so you get paid for it) serves 52. My carved price is $6 per serving frankly because I don't enjoy doing them. So, $312.

I recently did ax Xbox and controller, but the controller was more life sized and I just did it out of RKT. The cake was the Xbox.

Your controller looks awesome. I have a carved cake minimum of $150, doesn't matter how small. They can be a lot of work. They start at $5 a serving.