which one !
1: $9
2: $15
3: $21
4: $18
5: $12
6: $24

Answer:
$9 and $15
Step-by-step explanation:
Multiply the number of weeks (w) by $3 (m=$3w) to find the totals for each week:
3 $9 [Blank A]
5 $15 [Blank B]
7 $21