Question

Please help (I need a step by step explanation.)

Giving 13 points please put answer with step by step explanation

Answer 1

Group A is correct.

Explanation:

3 sets($3/set) = $9 - $2 coupon = $7

9 sets($3/set) = $27 - $2 coupon = $25

12 sets($3/set) = $36 - $2 coupon = $34

24 sets($3/set) = $72 - $2 coupon = $70

none of the other groups fit this pattern.