How much does a Two Tier Sweet 16 Cake Cost?

I want a simple Two Tier Topsy Turvy Sweet 16 cake. Maybe Zebra on the bottom. Cheetah Print on the top layer. With a Plastic 16 on top of the cake. With Stars on those sticks sticking out of everywhere. Colors would be pink, purple, silver, and lime green. Feed about 40 People. with my name written on the bottom. How much would that cost. Oh, I live in Winter Haven, Florida. I need help