Answer
Domain: $1 \leq x \leq 12 $
Range: $2.47\leq x \leq 29.64$
(Note, the upper values are approximations).
Work Step by Step
Because the party favors are 2.47 dollars each and you are constrained to a total cost under $30, a possible domain would be between 1 and 12. This creates a range of 2.47 to 29.64.
