Answer:
b. Store B
Explanation:
Store A offering copy paper for $3.00
Store B offering = $4.20 each and buy 2 get 1 free.
You need to buy 12 packs of paper.
If you buy in Store A, it will cost = 12*$3.00 = $36.00
If you buy in Store B,
You have to buy 8 packs for each $4.20 and you will get 4 free. Total you will get 12 packs.
Store B = 8*4.20 = $33.60
Store B cost less than store A.
Thank you.