The poster shows a lily sale at a flower cart. Ethan needs to get at least 19 lilies for a party. What is the smallest amount of money he will have to pay?
Number of lilies in a set
= 4 + 1
= 5
Number of sets in 19 lilies
= 19 ÷ 5
= 3 r 4
Number of sets needed
= 3 + 1
= 4
Smalllest amount that he will have to pay
= 4 x 3.20
= $12.80
Answer(s): $12.80