$83.40/60=1.39 coast of each horn is $1.39 1st answer is: FALSE
18•1.39=25.02$ for additional 18 horns at the same rate, Marissa will spend 25.02$ 2nd answer is : TRUE
60+18=78 Marissa will have total of 78 horns. 3rd answer is: TRUE
83.40 + 25.02= 108.42$ Marissa will spend total of 108.42$ for all horns.
4th answer: TRUE