Answer:
For the aditional 18 flowers, it costs 39.45$ total
Explanation:
I started by multiplying 5 times 24
5 for the treys she bought
24 for each flower that was in the trey
I got 120 now divide that by the total of 54.75
now you have the cost of the each indivitual flower which is $2.19 now you time that by 18 each flower thats how I got $39.45