This probably wont answer your questions in regard to price so please call me or shoot me an email at summer19@gmail.com. But to get you in the ball park...
Cupcakes range from $16/dozen to $36/dozen.
round or square cakes (1 tier but are double layered)
6" start at $35
8" start at $45
10" start at $50
12" start at 60
3 tier wedding cakes start at $225