You have to write a equation that represnts the problem whoch would start with f(x)=. Then you would put in the right numbers which is $2,500 for a one time labor fee and a $50 for every year book printed. In this case the x would go with the 50 since you dont know how many yearbooks are going to be printed. Hope I could help and have a nice day
. Then 
, and so as 
, you have 
. The limit is then equivalent to
