I have a graduation party coming up. They want a 3-tiered cake serving 55 people. What size pans? 12-9-6? 10-8-6? What should I charge? I live in CA. Thanks.

For only 55 servings you only need somthing like 10, 6, and 4" round tiers. 10x4=39; 6x4 = 10-12 and the 4x3 = 6.
OR you could use a single layer 12, w/an 8x4 and 6x3 on it. The single 12 = 25 servings (2x2x2); the 8x4 = 25 and the 6x3 about 10-12

As for pricing I suggest no less than $2.50 to $3 per servings.....so about $150-175