The poster shows a lavender sale at a supermarket. Justin needs to get at least 19 lavenders for a party. What is the smallest amount of money he will have to pay?
Number of lavenders in a set
= 3 + 1
= 4
Number of sets in 19 lavenders
= 19 ÷ 4
= 4 r 3
Number of sets needed
= 4 + 1
= 5
Smalllest amount that he will have to pay
= 5 x 4.30
= $21.50
Answer(s): $21.50