I had someone ask for a price on a full sheet cake.... I don't know how large a full sheet cake is, and therefore have no idea how to price it... Is a full sheet cake like four 9x13s?

This will vary depending on who you ask, but a commercial full sheet is generally 18x26, 1/2 sheet is 18x13 and a 1/4 is 9x13.

So yes, a full sheet cake would be 4 9x13's

Thanks!